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2450CM 81000461
Switch, Thermostat, SPST-NC, 15A, 120 VAC, Quick Connect
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: HONEYWELL
- Product type: Thermostat Switches
- SVHC: No SVHC (07-Jul-2017)
- Product Range: 2450CM Series
- Contact Rating: 15A at 120VAC
- Sensor Housing: Flange Mount
- Sensor Terminals: Quick Connect
- Contact Operation: Normally Closed
- Reset Temperature: -
- Switching Temperature: -
| Delivery and price | |
|---|---|
| Units per pack | 50 |
| Price | 21.56 € |
| Current stock | 50+ |
| Lead time | 30 days |
Datasheet
## **Commercial Thermostats**
## +Bow
## **DESCRIPTION**
Thermostats can provide either temperature control or overtemperature protection by breaking electrical contact when a specified temperature is reached.
Honeywell manufactures a wide range of 12,7 mm [0.5 in] commercial snap-action thermostats for possible use in a wide array of small and major appliances, office copy machines, medical equipment, heat detectors, HVAC equipment and more.
These snap-action thermostats include automatic and manual reset options, phenolic or ceramic housings and a wide variety of mounting brackets and terminal options.
Each thermostat's design is configured from a base unit, and may be customized for temperature tolerance and mechanical configurations, meeting the customer’s needs for accuracy and exactitude.
Honeywell can also integrate these thermostats in higher value cable assemblies, incorporating wire harness and connectors.
## **TABLE OF CONTENTS**
|**TABLE OF CONTENTS**||
|---|---|
|**DESCRIPTION **|p. 1|
|**NOMENCLATURE**|p. 2|
|**DEFINITION OF TERMS**|p. 3|
|**NOTES**|p.3|
|**COMMERCIAL THERMOSTATS**||
|2450R/2450HR/2455R/2452R/2452HR Series Phenolic Automatic Reset|p. 4|
|2450RC/2450RCH/2455RC Series Ceramic Automatic Reset|p. 6|
|2455RM/2450CM Series Phenolic or Ceramic Manual Reset|p. 9|
|2455RD Series Phenolic Manual Reset|p. 11|
|2455RBV Series Overmolded Automatic Reset|p. 13|
|2450A/2455RA Series Heat Detection|p. 15|
|2450R/2455R/2450RC/2455RC/2450HR/2450RCHSeries“One Shot”|p. 17|
|**REDI-TEMP THERMOSTATS**||
|3455RC Series|p. 19|
|**MOUNTING HARDWARE**||
|Brackets|p. 20|
|Brass mounting studs|p. 21|
|Terminals|p. 22|
## **Commercial Thermostats**
## **NOMENCLATURE**
The nomenclature given in Figure 1 is provided for reference only.
## **Figure 1. Commercial Thermostat Nomenclature**
2 www.honeywell.com/sensing
## **DEFINITION OF TERMS**
- **Automatic Reset:** A type of thermostat that will automatically reset at a specific temperature (i.e. a thermostat operates at 65,5 oC [150 oF] and resets at 48,89 oC [120 oF]).
- **Bimetal:** Two dissimilar metals bonded together to form the material for manufacturing thermally-sensitive discs which actuate the thermostat.
- **Close on Rise (COR):** Refers to operation of the contacts. When the temperature rises to its set point, the contacts close or make contact and complete the circuit.
- **Contact Resistance:** The value of resistance measured between the terminals.
- **Dielectric Strength** : The value of insulation between two electrically conducting parts. It may be tested by the application of a predetermined overvoltage for a specified time.
- **Differential:** The temperature difference between the operate and reset set points, also known as operate and reset.
- **Nominal:** The temperature difference between nominal set points regardless of tolerance.
- **Maximum:** Maximum number of degrees between actual opening and closing set points.
-
- **Minimum:** Minimum number of degrees between actual opening and closing set points.
- **Exposure Temperature:** Thermal environment of a device during application operation.
- **FLA (Full Load Amps):** Current taken from the line by the motor when the motor is yielding the rated hp at the rated voltage and frequency.
- **Life Cycles:** The endurance rating of the thermostat expressed in number of operations with stated electrical load applied. Temperature limit application = open on rise.
- **LRA (Locked Rotor Amps)** : The amount of current the motor can be expected to draw under starting conditions when full voltage is applied, also known as starting inrush current.
- **Manual Reset:** A bimetal thermostat with a reset button that must be pressed to reset the contacts.
- **Open on Rise (OOR):** Refers to the operation of contacts. When the temperature rises to its set point the contacts open, terminating the circuit.
- **Overmold:** Encapsulation with an insulating material.
- **Phenolic:** Thermoset plastic used for the insulating body of the thermostat.
- **Set Point:** The nominal temperature at which the thermostat operates.
- **SPST (Single Pole/Single Throw):** A switch with one current path which can be either open or closed.
- **Tolerance:** The allowable range above and below the set point temperature.
- **Operate:** Change of state when the thermostat reaches its set point.
- **Reset:** Change of state when the thermostat returns to its original condition prior to operation.
## **NOTES**
- **Standard Temperature Characteristics Tables:**
- **Temperatures:** Please consult applications engineering for temperature ranges, tolerances and differentials not noted. The operating temperature ranges include tolerances.
- **Tolerances:** The ± tolerances given have been established after review of many thermostat applications. Attempts should be made to establish the widest acceptable tolerance possible.
- **UL and CSA Approvals:** 12,7 mm [0.5 in] thermostats are available with multiple agency approval for incorporation into equipment.
- **Fan control applications:** Require thermostat set points to be derated by 20 °C from the equivalent temperature limit application. They also close on rise.
- **Dimensions:** Are for reference only and are given in mm [in].
Honeywell Sensing and Control 3
## **Commercial Thermostats**
**==> picture [391 x 9] intentionally omitted <==**
**----- Start of picture text -----**<br>
Figure 2. 2450R/2450HR/2455R/2452R/2452HR Series Phenolic Automatic Reset Thermostat<br>**----- End of picture text -----**<br>
The 2450R/2450HR/2455R/2452R/2452HR Series is a single pole, single throw, snap-acting, non-adjustable thermostat which may be used in applications such as power supplies, general appliances and medical equipment. A temperature-sensitive bimetal disc, electrically and thermally isolated from the switch, is used to actuate the normally-closed contacts. Contacts open when surface or ambient temperatures increase to the operating set point of the calibrated bimetal disc. The entire switch is enclosed in a phenolic housing; the bimetal disc is retained by a metal heat-conducting end cap. Due to the small size of this unit and the inherently low mass of the bimetal snap-action disc, response of this thermostat to temperature changes is extremely rapid, compared to other commercially available thermostatic devices. A variety of mounting brackets and terminals are available.
All versions are UL/CSA approved. The 2452R/2452HR/2455R version meets the requirements of EN60730-01.
Potential applications include:
- Power supplies
- Appliances
- Medical equipment
- Water heaters
- Office automation
- Industrial equipment
- HVAC equipment
**Table 1. 2450R/2450HR/2455R/2452R/2452HR Series Standard Temperature Characteristics**
|**Operating Temperature Range**<br>~~ee~~|**Tolerance**<br>~~Pee~~<br>~~esee~~|**Tolerance**<br>~~Pee~~<br>~~esee~~|**Standard Mean Differential**<br>**°C [°F]**<br>~~ee~~|
|---|---|---|---|
||**Open**<br>**°C[°F]**<br>~~Pee~~<br>~~es~~|**Close**<br>**°C[°F]**<br>~~Pee~~<br>~~ee~~||
|0 °C to 26 °C<br>[32 °F to 79 °F]<br>~~ee~~|±4[±7]<br>~~Pee~~<br>~~es~~<br>~~es~~|±6[±10]<br>~~Pee~~<br>~~ee~~<br>~~es~~<br>~~nn~~|28 to 34[50 to 60]<br>~~ee~~<br>~~es~~|
||±4[±6]<br>~~rs~~|±6[±10]<br>~~rs~~<br>~~nn~~<br>~~nn~~|22 to 27[40 to 49]<br>~~rs~~|
||±4[±6]<br>~~rs~~<br>~~rs~~|±5[±9]<br>~~nn~~<br>~~rs~~<br>~~nn~~<br>~~nn~~<br>|17 to 22[30 to 39]<br>~~rs~~|
||±4[±6]<br>~~rs~~<br>~~rs es~~|±5[±8]<br>~~nn~~<br>~~rs~~<br>~~nn~~<br>~~es~~|14 to 16[25 to 29]<br>~~rs~~|
||±3[±5]<br>~~rs es~~|±5[±8]<br>~~nn~~<br>~~es~~|8 to 14[15 to 24]|
|27 °C to 82 °C<br>[80 °F to 180 °F]<br>~~Po~~<br>~~Po~~|±5[±9]<br>~~rs es~~<br>~~ee~~<br>~~Po~~|±8[±15]<br>~~nn~~<br>~~es~~<br>~~ee~~|45 to 56[81 to 100]<br>~~ee~~|
||±4[±7]<br>~~Po~~<br>~~Po~~|±6[±11]|34 to 45[61 to 80]|
||±4[±6]<br>~~Po~~<br>~~Po~~|±6[±10]|28 to 34[50 to 60]|
||±3[±5]<br>~~Po~~<br>~~es~~|±6[±10]<br>~~es~~<br>~~nn~~|22 to 27[40 to 49]<br>~~es~~|
||±3[±5]<br>~~rs~~<br>~~a~~|±5[±9]<br>~~rs~~<br>~~nn~~<br>~~Ce~~|17 to 22[30 to 39]<br>~~rs~~|
||±3[±5]<br>~~es~~<br>~~a~~|±5[±8]<br>~~nn~~<br>~~es~~<br>~~Ce~~|8 to 16[15 to 29]<br>~~es~~|
|83 °C to 110 °C<br>[181 °F to 230 °F]<br>~~Po~~<br>~~Po~~<br>~~Po~~|±6[±10]<br>~~a~~|±8[±15]<br>~~Ce~~|45 to 56[81 to 100]|
||±5[±8]<br>~~es~~<br>~~Po~~|±8[±15]<br>~~es~~|34 to 45[61 to 80]<br>~~es~~|
||±4[±7]<br>~~Po~~<br>~~Po~~|±7[±12]|28 to 34[50 to 60]|
||±4[±6]<br>~~Po~~<br>~~Po~~<br>~~Po~~|±6[±10]|22 to 27[40 to 49]|
||±4[±6]<br>~~Po~~<br>~~Po~~|±5[±9]|17 to 22[30 to 39]|
||±4[±6]<br>~~Po~~<br>~~ee~~|±5[±8]<br>~~ee~~|8 to 16[15 to 29]<br>~~ee~~|
|111 °C to 150 °C<br>[231 °F to 302 °F]|±7[±12]<br>~~es~~|±10[±18]<br>~~es~~<br>~~nn~~|45 to 56[80 to 100]<br>~~es~~|
||±5[±9]<br>~~rs~~|±8[±15]<br>~~rs~~<br>~~nn~~<br>~~nn~~|34 to 45[61 to 80]<br>~~rs~~|
||±5[±8]<br>~~rs~~|±7[±12]<br>~~nn~~<br>~~rs~~<br>~~nn~~<br>~~nn~~|28 to 34[50 to 60]<br>~~rs~~|
||±4[±7]<br>~~rs~~|±7[±12]<br>~~nn~~<br>~~rs~~<br>~~nn~~<br>~~nn~~|22 to 27[40 to 49]<br>~~rs~~|
||±4[±7]<br>~~rs~~|±6[±11]<br>~~nn~~<br>~~rs~~<br>~~nn~~<br>~~Ce~~|17 to 22[30 to 39]<br>~~rs~~|
||±4[±7]<br>~~es~~|±6[±10]<br>~~nn~~<br>~~es~~<br>~~Ce~~|14 to 16[25 to 29]<br>~~es~~|
4 www.honeywell.com/sensing
**Table 2. 2450R/2450HR/2455R/2452R/2452HR Series Specifications**
|**Characteristic**|**Parameter**|
|---|---|
|Switch type|SPST|
|Reset type|automatic|
|Amperage|See Tables 3,4|
|Voltage|120 Vac to 250 Vac|
|Operatingtemperature range|0 °C to 150 °C[32 °F to 302 °F]|
|Environmental exposure range|-18 °C to 177 °C[0 °F to 350 °F]|
|Materials:<br>Base<br>Contacts<br>Terminals<br>Closure<br>Brackets|phenolic<br>silver alloy<br>unplated brass, plated brass or steel<br>aluminum, brass or stainless steel<br>aluminum or stainless steel|
|UL and CSA approvals|• 2455R: 6,35 mm [0.25 in] clearance; UL File MH8267, UL File E36103; CSA File LR21048<br>• 2450HR: 1,59 mm [0.0625 in] clearance; UL File E36103; CSA File LR21048<br>• 2450R: 1,59 mm [0.0625 in] clearance; UL File E36103; CSA File LR 21048<br>• 2452R: 2.66mm [0.105 in] clearance; UL E36103<br>• 2452HR: 2.66mm[0.105 in]clearance;UL36103|
|Weight|6g [0.2 oz] (does not include brackets or wire leads)|
## **Table 3. 2450R/2450HR/2452R/2452HR Contact Ratings**
|**Life Cycles**|**120 Vac**|**240 Vac**|**277 Vac**|
|---|---|---|---|
|100,000|15A resistive|10A resistive|10A resistive|
|30,000|125 VApilot duty|125 VApilot duty|-|
**Note:** 2450 approval rating is limited by EN60730-1 to 125 Vac max.
**Table 4. 2455R Contact Ratings**
|**Life Cycles**|**120 Vac**|**240 Vac**|**277 Vac**|
|---|---|---|---|
|100,000|15 A resistive<br>4.4 FLA 26.4 LRA<br>125VApilot duty|10 A resistive<br>2.2 FLA 13.2 LRA<br>125VApilot duty|7.2 A resistive|
|6,000|5.8 FLA,34.8 LRA|2.9 FLA,17.4 LRA|-|
**Note** : Additional contact ratings are available, please contact Honeywell.
## **Figure 3. 2450R/2450HR/2455R/2452R/2452HR Basic Dimensions**
**==> picture [391 x 118] intentionally omitted <==**
**----- Start of picture text -----**<br>
2450R 2450HR 2455R<br>4 0.2656,73<br>+ 13,94<br>16,0 DIA : + 0,51 ms , | MPA 9,63 19.486)12,34 10-5491<br>[oses] 399) : [0.020] 1 6 ,0 DIA [0.379]! ]<br>[0.630]<br>2452R 2452HR<br>**----- End of picture text -----**<br>
Honeywell Sensing and Control 5
## **Commercial Thermostats**
## **Figure 4. 2450RC/2450RCH/2455RC Series Automatic Reset Thermostat**
The 2450RC/2450RCH/2455RC Series is a single pole, single throw, snap-acting, non-adjustable thermostat which may be used in applications such as industrial and electrical equipment. A temperature-sensitive bimetal disc, electrically and thermally isolated from the switch, is used to actuate the normally-closed contacts. Contacts open when surface or ambient temperatures increase to the operating set point of the calibrated metal disc. The entire switch is enclosed in a ceramic housing; the bimetal disc is retained by a metal heat-conducting end cap. Due to the small size of this unit and the inherently low mass of the bimetal snap-action disc, response of this thermostat to temperature changes is extremely rapid, compared to other commercially available thermostatic devices. For increased sensitivity, an exposed bimetal disc may be specified. A variety of mounting brackets and terminals is available.
All versions are UL/CSA and European approved.
Potential applications include high temperature control for:
- Power supplies
- Appliances
- Medical equipment
- Water heaters
- Office automation
- Industrial equipment
- HVAC equipment
**Table 5. 2450RC/2450RCH/2455RC Series Standard Temperature Characteristics**
|**Operating Temperature Range**<br>~~Po~~<br>~~ee~~|**Tolerance**<br>~~Po~~<br>~~ee~~<br>~~esse~~|**Tolerance**<br>~~Po~~<br>~~ee~~<br>~~esse~~|**Standard Mean Differential**<br>**°C [°F]**<br>~~ee~~<br>~~se~~|
|---|---|---|---|
||**Open**<br>**°C[°F]**<br>~~Po~~<br>~~ee~~<br>~~es~~|**Close**<br>**°C[°F]**<br>~~ee~~<br>~~se~~||
|0 °C to 26 °C<br>[32 °F to 79 °F]<br>~~ES~~|±4[±7]<br>~~es ~~<br>~~es~~<br>~~S~~|±6 [±10]<br> ~~se~~<br>~~es~~<br>~~**e**s~~|28 to 34[50 to 60]<br>~~se~~<br>~~es~~<br>~~S~~|
||±4[±6]<br>~~S~~|±6 [±10]<br>~~**e**s~~|22to27[40 to49]<br>~~S~~|
||±4[±6]<br>~~S~~|±5 [±9]<br>~~**e**s~~|17to22[30 to 39]<br>~~S~~|
||±4[±6]<br>~~S~~<br>~~————~~|±5 [±8]<br>~~**e**s~~<br>~~————~~|14to16 [25 to29]<br>~~S~~<br>~~————~~|
||±3[±5]<br>~~S~~<br>~~————~~|±5[±8]<br>~~**e**s~~<br>~~————~~|8 to 14[15 to 24]<br>~~S~~<br>~~————~~|
|27 °C to 82 °C<br>[80 °F to 180 °F]<br>~~ES~~<br>~~SSS~~<br>~~SSS~~|±5 [±9]<br>~~S~~<br>~~SS~~<br>~~SSS~~|±8 [±15]<br>~~**e**s~~<br>~~SS~~<br>~~SSS~~|45 to 56 [81 to 100]<br>~~S~~<br>~~SS~~<br>~~SSS~~|
||±4[±7]<br>~~SS~~<br>~~es~~<br>~~SSS~~|±6 [±11]<br>~~SS~~<br>~~SSS~~|34to45 [61to 80]<br>~~SS~~<br>~~SSS~~|
||±4[±6]<br>~~es~~<br>~~SSS~~|±6 [±10]<br>~~SSS~~|28 to 34[50 to 60]<br>~~SSS~~|
||±3 [±5]<br>~~es~~<br>~~SSS~~|±6 [±10]<br>~~SSS~~|22 to 27[40to 49]<br>~~SSS~~|
||±3 [±5]<br>~~SSS~~|±5 [±9]<br>~~SSS~~|17to22[30 to 39]<br>~~SSS~~|
||±3[±5]<br>~~SSS~~<br>~~SSS~~|±5[±8]<br>~~SSS~~<br>~~es~~<br>~~SSS~~|8 to 16[15 to 29]<br>~~SSS~~<br>~~SSS~~|
|83 °C to 110 °C<br>[181 °F to 230 °F]<br>~~SSS~~<br>~~SSS~~|±6 [±10]<br>~~SSS~~<br>~~as~~<br>~~SSS~~|±8 [±15]<br>~~SSS~~<br>~~as~~<br>~~es~~<br>~~SSS~~|45 to 56 [81 to 100]<br>~~SSS~~<br>~~as~~<br>~~SSS~~|
||±5 [±8]<br>~~—~~<br>~~SSS~~|±8 [±15]<br>~~es~~<br>~~—~~<br>~~SSS~~|35to 45 [61 to80]<br>~~—~~<br>~~SSS~~|
||±4[±7]<br>~~—~~<br>~~SSS~~|±7[±12]<br>~~—~~<br>~~SSS~~|28 to 34[50 to 60]<br>~~—~~<br>~~SSS~~|
||±4[±6]<br>~~SSS~~|±6 [±10]<br>~~SSS~~|22to27[40 to49]<br>~~SSS~~|
||±4[±6]<br>~~SSS~~|±5 [±9]<br>~~SSS~~|17to22[30 to 39]<br>~~SSS~~|
||±4[±6]<br>~~SSS~~|±5[±8]<br>~~SSS~~|8 to 16[15 to 29]<br>~~SSS~~|
6 www.honeywell.com/sensing
**Table 6. 2450RC/2450RCH/2455RC Series Standard Temperature Characteristics (continued)**
|**Tolerance**<br>**Operating Temperature Range**<br>**Open**<br>**°C[°F]**<br>**Close**<br>**°C[°F]**<br>±7[±12]<br>±10 [±18]<br>~~ee~~<br>~~a~~|**Tolerance**<br>**Operating Temperature Range**<br>**Open**<br>**°C[°F]**<br>**Close**<br>**°C[°F]**<br>±7[±12]<br>±10 [±18]<br>~~ee~~<br>~~a~~|**Standard Mean Differential**<br>**°C [°F]**<br>45 to 56 [81to100]<br>~~ee~~|
|---|---|---|
||±5 [±9]<br>±8 [±15]<br>34to45 [61to 80]<br>~~ee~~||
|111 °C to 149 °C|±5 [±8]<br>±7[±12]<br>28 to 34[50 to 60]<br>~~ee~~||
|[231 °F to 300 °F]|±4[±7]<br>±7[±12]<br>22 to 27[40to 49]<br>~~ee~~||
||±4[±7]<br>±6 [±11]<br>17 to 22[30to39]<br>~~ee~~||
||±4[±7]<br>±6[±10]<br>14 to 16[25 to 29]<br>~~ee~~||
||±8 [±15]<br>±11 [±20]<br>~~a~~|39 to 45 [71 to 80]|
|150 °C to 170 °C|±6 [±10]<br>±11[±20]<br>34 to39 [61 to 70]<br>~~ee~~||
|[301 °F to 335 °F]<br>171 °C to 220 °C<br>[336 °F to 425 °F]|±6 [±10]<br>±8 [±15]<br>28to33 [50to60]<br>±6[±10]<br>±7[±12]<br>22 to 27[40 to 49]<br>±14 [±25]<br>±14 [±25]<br>51 to 56 [91 to 100]<br>±11[±20]<br>±11[±20]<br>39to50 [71 to90]<br>±8[±15]<br>±11[±20]<br>28 to 39[50 to 70]<br>~~ee~~<br>~~ee~~<br>~~a~~<br>~~ee~~<br>~~ee~~||
|221 °C to 235 °C<br>[426 °F to 450 °F]|±14 [±25]<br>±14 [±25]<br>51 to 56 [91 to 100]<br>±11[±20]<br>±11[±20]<br>39 to 50 [71to 90]<br>±8[±15]<br>±11[±20]<br>28 to 39[50 to 70]<br>~~a~~<br>~~ee~~<br>~~ee~~||
|236 °C to 260 °C<br>[451 °F to 500 °F]|±14 [±25]<br>±14 [±25]<br>±11[±20]<br>±11[±20]<br>~~a~~<br>~~ee~~|31 to 56 [60 to 100]<br>28 to 50[50 to 90]|
|**Table 7. 2450RC/2450RCH/2455RC Series Specifications**|||
|**Characteristic**|**Parameter**||
|Switchtype|SPST||
|Reset type|automatic||
|Amperage|See Tables8, 9||
|Voltage|120Vac to250Vac||
|Operating temperaturerange|0°C to260°C [32 °Fto 500°F]||
|Environmentalexposurerange|-20°C to287 °C [0°Fto 550°F]||
|Materials:|||
|Base|ceramic||
|Contacts|silver alloy||
|Terminals|plated steel||
|Closure|aluminum, brass, or stainless steel||
|Brackets|stainless steel||
|Approvals|• 2450RCH: 1,59 mm [0.0625 in] clearance through air and over surface; UL File E36103;||
||CSA File LR21048||
||• 2450RC: 1,59 mm [0.0625 in] clearance; UL file E36103; CSA File LR21048||
||• 2455RC:6,35mm[0.25in]clearance; UL File E36103; CSA File LR21048||
|Weight|6g [0.21 oz] (does not include brackets or wire leads)||
**Table 7. 2450RC/2450RCH/2455RC Series Specifications**
Honeywell Sensing and Control 7
## **Commercial Thermostats**
**Table 8. 2450RCH/2450RC Contact Ratings**
|**Life Cycles**|**120 Vac**|**240 Vac**|
|---|---|---|
|100,000|15 A resistive|10 A resistive|
|30,000|125 VApilot duty|125 VApilot duty|
**Table 9. 2455RC Contact Ratings**
|**Life Cycles**|**120 Vac**|**240 Vac**|
|---|---|---|
|100,000|15A resistive|10A resistive|
|100,000|4.4 FLA 26.4 LRA|2.2 FLA 13.2 LRA|
|100,000|125 VApilot duty|125 VApilot duty|
**Note:** Additional contact ratings are available, please contact Honeywell.
|**Figure 5. 2450RC/2450RCH/2455RC Basic Dimensions**|**Figure 5. 2450RC/2450RCH/2455RC Basic Dimensions**||
|---|---|---|
|**2450RC**|**2450RCH**|**2455RC**|
8 www.honeywell.com/sensing
## **Figure 6. 2455RM/2450CM Series Phenolic or Ceramic Manual Reset Thermostats**
The 2455RM (phenolic)/2450CM (ceramic) Series is a single pole, single throw, snap-acting, non-adjustable thermostat. A temperature-sensitive bimetal disc, electrically and thermally isolated from the switch, is used to actuate the normally-closed contacts. Contacts open when surface or ambient temperatures increase to the operating set point of the calibrated bimetal disc. The entire switch is enclosed in a housing; the bimetal disc is retained by a metal heatconducting end cap. The circuit remains open above the room ambient temperature until the manual reset button is depressed. Due to the small size of this unit and the inherently low mass of the bimetal snap-action disc, response of this thermostat to temperature changes is extremely rapid, compared to other commercially available thermostatic devices. For increased sensitivity, an exposed bimetal disc may be specified. A variety of mounting brackets and terminals is available.
All versions are UL/CSA, European approved.
Potential applications include those where a manual reset is desired, including:
- Power supplies
- Appliances
- Medical equipment
- Water heaters
- Office automation
- Industrial equipment
- HVAC equipment
**Table 10. 2455RM Series Standard Temperature Characteristics**
|**Operating Temperature Range**|**Tolerance °C [°F]**|
|---|---|
|52 °C to 93 °C[125 °F to 200 °F]|±5[±8]|
|94 °Cto 121 °C [201 °F to 250°F]|±6 [±10]|
|122 °C to 150 °C[251 °F to 302 °F]|±7[±12]|
**Table 11. 2450CM Series Standard Temperature Characteristics**
|**Operating Temperature Range**|**Tolerance °C [°F]**|
|---|---|
|52 °Cto93°C [125°F to 200°F]|±5 [±8]|
|94 °C to 121 °C[201 °F to 250 °F]|±6[±10]|
|122 °Cto 149°C [251 °F to300°F]|±7[±12]|
|150°Cto 177 °C [301 °F to350°F]|±8 [±15]|
|177 °Cto 204 °C [351 °F to 400°F]|±10 [±18]|
|205 °C to 232 °C[401 °F to 450 °F]|±11[±20]|
Honeywell Sensing and Control 9
## **Commercial Thermostats**
**Table 12. 2455RM/2450CM Series Specifications**
|**Characteristic**|**Parameter **|
|---|---|
|Switch type|SPST|
|Reset type|manual|
|Amperage|15A resistive at 6,000 cycles (UL);16A resistive at1000 cycles (EU)|
|Voltage|120Vac to250Vac|
|Operating temperature range|2455RM: 52 °C to 150 °C [125 °F to 302 °F]<br>2450CM:52 °C to232 °C [125°Fto450°F]|
|Environmental exposure range|2455RM: -20 °C to 177 °C [0 °F to 350 °F]<br>2450CM: -20°Cto 260°C [0°F to500°F]|
|Materials:<br>Base<br>Contacts<br>Terminals<br>Closure<br>Brackets|2455RM: phenolic; 2450CM: ceramic<br>silver alloy<br>2455RM: unplated brass, plated brass or steel; 2450CM: plated steel<br>aluminum, brass, or stainless steel<br>stainless steel|
|Approvals|UL FileE36103, CSA FileLR21048|
|Weight|6g [0.21 oz] (does not include brackets or wire leads)|
## **NOTICE**
- 2455RM/2450CM thermostats are intended as a manual reset control. They are not to be used on applications where a limit thermostat is required unless back-up protection is provided. Units have been tested by UL for 1,000 cycles under load, 5,000 cycles no load, and are not considered as limit devices.
- This range of thermostats has an automatic reset function with manual override function.
- Reset pin operation should not be performed above 70% of set point temperature.
**Table 13. 2450CM/2455RM Contact Ratings**
|**Life Cycles**|**120 Vac**|**240 Vac**|
|---|---|---|
|6,000|15A resistive|10A resistive|
|6,000|4.4 FLA 26.4 LRA<br>125 VApilot duty|2.2 FLA 13.2 LRA<br>125 VApilot duty|
**Note:** Additional contact ratings are available, please consult Honeywell.
**Figure 7. 2455RM/2455CM Basic Dimensions**
**==> picture [271 x 8] intentionally omitted <==**
**----- Start of picture text -----**<br>
2455RM 2450CM<br>**----- End of picture text -----**<br>
**A** Maximum travel of reset button on contact opening
**B** On contact closing
**C** Reset button
10 www.honeywell.com/sensing
## **Figure 8. 2455RD Series Phenolic Manual Reset**
The 2455RD Series is a single pole, single throw, snapacting, non-adjustable thermostat. A temperature-sensitive bimetal disc, electrically and thermally isolated from the switch, is used to actuate the normally-closed contacts. Contacts open when surface or ambient temperatures increase to the operating set point of the calibrated bimetal disc. The entire switch is enclosed in a housing; the bimetal disc is retained by a metal heat-conducting end cap. The circuit remains open above the room ambient temperature until the manual reset button is depressed. (These devices are constructed with an additional steel disc so that they are manual reset only. They do not have an automatic reset.) Due to the small size of this unit and the inherently low mass of the bimetal snap-action disc, response of this thermostat to temperature changes is extremely rapid, compared to other commercially available thermostatic devices. For increased sensitivity, an exposed bimetal disc may be specified. A variety of mounting brackets and terminals is available.
All versions are UL/CSA and European approved.
Potential applications include those where a manual reset is desired, including:
- Power supplies
- Appliances
- Medical equipment
- Water heaters
- Office automation
- Industrial equipment
- HVAC equipment
**Table 14. 2455RD Series Standard Temperature Characteristics**
**Operating Temperature Range Tolerance °C [°F]** 52 °C to 93 °C [125 °F to 200 °F] ±5 [±8] 94 °C to 121 °C [201 °F to 250 °F] ±6 [±10] ~~—S~~ 122 °C to 150 °C [251 °F to 302 °F] ±7 [±12]
Honeywell Sensing and Control 11
## **Commercial Thermostats**
**Table 15. 2455RD Series Specifications**
|**Table 15. 2455RD Series Specificationspecificationsecifications**||
|---|---|
|**Characteristic**|**Parameter **|
|Switch type|SPST|
|Reset type|manual|
|Amperage|15A resistive at 6,000 cycles (UL);16A resistive at1000 cycles (EU)|
|Voltage|120Vac to250Vac|
|Operating temperaturerange|2455RD:52 °C to150°C [125°Fto 302 °F]|
|Environmental exposure range|2455RD: -20°Cto 177 °C [0°F to350°F]|
|Materials:<br>Base<br>Contacts<br>Terminals<br>Closure<br>Brackets|phenolic<br>silver alloy<br>unplated brass, plated brass or steel<br>aluminum, brass, or stainless steel<br>stainless steel|
|Approvals|UL File E36103,CSA File LR21048|
**Table 16. 2455RD Contact Ratings**
|**Table 16. 2455RD Contact Ratingsgss **|||
|---|---|---|
|**Life Cycles**|**120 Vac**|**240 Vac**|
|6000|15 A resistive|10 A resistive|
**Note:** Additional contact ratings are available, please consult Honeywell.
## **Figure 9. 2455RD Basic Dimensions**
**A** Maximum travel of reset button on contact opening **B** On contact closing
**C** Reset button
12 www.honeywell.com/sensing
## **Figure 10. Series 2455RBV Overmolded Automatic Reset Thermostats**
The 2455RBV Series has a temperature-sensitive bimetal disc, electrically and thermally isolated from the switch that is used to actuate the normally closed contacts. The contacts open when surface or ambient temperatures increase to the operating set point of the calibrated bimetal disc. The entire switch is enclosed in a phenolic or ceramic housing; the bimetal disc is retained by a metal heatconducting end cap. The unit is then encapsulated in epoxy.
**==> picture [193 x 53] intentionally omitted <==**
**----- Start of picture text -----**<br>
|||
|---|---|
|This series is UL/CSA and European approved.|
|Potential applications include:|
|•|Automotive|
|•|Industrial equipment|
|•|HVAC|
**----- End of picture text -----**<br>
**Table 17. 2455RBV Series Standard Temperature Characteristics**
**==> picture [494 x 98] intentionally omitted <==**
**----- Start of picture text -----**<br>
|||||||||
|---|---|---|---|---|---|---|---|
|Operating Temperature Range|Tolerance|Standard Mean Differential|
|Open|Close|°C [°F]|
|°C [°F]|°C [°F]|
|±4 [±7]|±6|[±10]|17 to 44 [30|to|80]|
|-12,2 °C to 26,7 °C|
|±3|[±6]|±4 [±8]|14 to 28|[25|to|50]|
|[10 °F to 80 °F]|
|±3 [±5]|±4 [±8]|11 to 22 [20 to 40]|
|27,2 °C to 105 °C|±3|[±6]|±6|[±10]|17 to 44 [30|to|80]|
|[81 °F to 221 °F]|±3 [±5]|±4 [±8]|11 to 28 [20 to 50]|
**----- End of picture text -----**<br>
Honeywell Sensing and Control 13
## **Commercial Thermostats**
**Table 18. 2455RBV Series Specifications**
|**Characteristic**|**Parameter **|
|---|---|
|Switch type|SPST|
|Reset type|automatic|
|Amperage|seeTable19|
|Voltage|120Vac to250Vac|
|Operating temperaturerange|0°C to105°C [32 °Fto221 °F]|
|Environmental exposure range|-18°Cto 126.6°C [0°F to 260°F]|
|Materials:<br>Boot<br>Base<br>Contacts<br>Terminals<br>Closure<br>Brackets|nylon, with epoxy filled or injection molded<br>internal 2455RC ceramic or 2455R phenolic<br>silver alloy<br>plated steel with wires<br>aluminum, brass, or stainless steel<br>stainless steel|
|Approvals|UL File SA4469, CSA FileLR21048.|
|Weight|6.5g [0.23 oz] (does not include brackets or wire leads)|
**Table 19. 2455RBV Series Contact Ratings**
|**Life Cycles**|**120 Vac**|**240 Vac**|
|---|---|---|
|100,000|15A resistive|10A resistive|
|6,000|5.8FLA34.8LRA|2.9FLA 17.4 LRA|
|100,000|4.4 FLA 26.4 LRA<br>125 VApilot duty|2.2 FLA 13.2 LRA<br>125 VApilot duty|
**Note:** Additional contact ratings are available, please contact Honeywell.
## **Figure 11. 2455RBV Basic Dimensions**
**==> picture [124 x 200] intentionally omitted <==**
**----- Start of picture text -----**<br>
B<br>A<br>B<br>18,54<br>[0.730]<br> 17,27 DIA.<br>0,020<br>[0.680]<br>[0.51]<br>**----- End of picture text -----**<br>
**A** Specify wire gauge and insulation **B** Specify dimension
14 www.honeywell.com/sensing
**Figure 12. 2450A/2455RA Heat Detection Thermostats**
The 2450A/2455RA Series is a single pole, single throw, snap-acting, non-adjustable thermostat designed for easy mounting in devices such as fire alarms, security devices and smoke detectors. A temperature-sensitive bimetal disc, electrically and thermally isolated from the switch, is used to actuate the normally-closed contacts. Contacts open when surface or ambient temperatures increase to the operating set point of the calibrated bimetal disc. Devices are UL recognized and designed for use in both photoelectric and ionization type smoke detectors. Thermostats are available with and without collectors and meet UL spacing requirements for 15 ft, 30 ft and 50 ft. They are available to open or close on a temperature rise of 47 107 °C [225 °F]. Devices feature gold contacts for low °C [117 °F] to voltage requirements and are epoxy sealed at the cap and terminal for long storage life of the application. Collectors are available in silver, black, beige, gold or bronze finishes.
All versions are UL approved.
Potential applications:
- Smoke alarm/heat detectors in industrial, residential and commercial
## **NOTICE**
Final approval of a fire detection system is determined by UL as outlined in UL #521 and UL #217 for the suitability of the combination of the thermostat (2450A/2455RA) and the user’s mounting base, together with its intended application of the total fire detection system. To assist the use with design and testing , a minimum of 0.25 in extension beyond the housing is recommended.
**Table 20. 2450A/2455RA Series Standard Temperature Characteristics**
|**Detection(Close on Rise)**|**Detection(Close on Rise)**|**Release(Open on Rise)**|**Release(Open on Rise)**|
|---|---|---|---|
|**Close**<br>**°C [°F]**|**Open**<br>**°C [°F]**|**Open**<br>**°C [°F]**|**Close**<br>**°C [°F]**|
|47 ±3[117±5]|30 min[85 min]|57 ±3[117 ±5]|30 min[85 min]|
|57 ±3[135 ±5]|32 min[90 min]|57 ±3[135 ±5]|32 min[90 min]|
|69 ±3[156 ±5]|32 min[90 min]|69 ±3[156 ±5]|32 min[90 min]|
|85 ±4[185 ±7]|32 min[90 min]|85 ±4[185 ±7]|32 min[90 min]|
|107 ±4[225 ±7]|32 min[90 min]|107 ±4[225 ±7}|32 min[90 min]|
## **Notes:**
- Additional switches can be provided as long as they fall between 47,2 °C to 107,2 °C [117 °F to 225 °F] close on rise or open or rise.
- Please consult Honeywell for tolerances and temperatures not listed.
Honeywell Sensing and Control 15
## **Commercial Thermostats**
**Table 21. 2450A/2455RA Series Specifications**
|**Characteristic**|**Parameter **|
|---|---|
|Switch type|SPST|
|Reset type|automatic|
|Amperage|3A|
|Voltage|120Vac|
|Operating temperaturerange|47,2 °C to107,2 °C [117 °Fto225°F]|
|Environmental exposure range|-0°Cto 150°C [32 °F to302 °F]|
|Materials:<br>Base<br>Contacts<br>Terminals<br>Closure<br>Brackets|phenolic<br>gold flash<br>unplated brass, plated brass<br>aluminum<br>aluminum|
|Approvals|UL FileS1015andS1389; GuideUSCV2 and TAOZ2, ULStandard #521,#217|
|Weight|6g [0.21 oz] (does not include brackets)|
## **Figure 13. 2450A/2455RA Basic Dimensions**
**==> picture [510 x 138] intentionally omitted <==**
**----- Start of picture text -----**<br>
2450A 2455RA<br>4 F<br>9,63 11,91<br>[0.379] [0.469]<br>0,51<br>; 0,51<br>[0.020] 10.020]<br>Figure 14. 2450A/2455RA Collector Figure 15. 2450A and 2455RA Spacing<br>B247 2450A: 4,6 m [15 ft] 2455RA with B247A: 15,2 m [50 ft]<br>**----- End of picture text -----**<br>
16 www.honeywell.com/sensing
## **Figure 16. 2450R/2455R/2450RC/2455RC/2450HR/2450RCH Series “One Shot” Thermostats**
The 2450R/2455R/2450RC/2455RC/2450HR/2450RCH Series “One Shot” is a single pole, single throw, snapacting, non-adjustable thermostat designed as a high limit device for applications where automatically resettable thermostats are not desirable. A temperature-sensitive bimetal disc, electrically and thermally isolated from the switch, is used to actuate the normally-closed contacts. Contacts open when surface or ambient temperatures increase to the operating set point of the calibrated bimetal disc. The entire switch is enclosed in a housing; the bimetal disc is retained by a metal heat-conducting end cap. The circuit remains open above the room ambient temperature and will reset below -35 °C [-31 °F]. For increased sensitivity, an exposed disc may be specified. A variety of mounting brackets and terminals is available.
All versions are UL/CSA approved and European approved.
Potential applications include:
- Power supplies
- Appliances
- Medical equipment
- Water heaters
- Office automation
- Industrial equipment
- HVAC equipment
**Table 22. 2450R/2455R/2450RC/2455RC/2450HR/2450RCH Series “One Shot” Standard Temperature Characteristics**
|**Operating Temperature Range**|**Tolerance °C [°F]**|
|---|---|
|52 °Cto93°C [125°F to 200°F]|5 [8]|
|94 °C to 121 °C[201 °F to 250°F]|6[10]|
|122 °Cto 149°C [251 °F to300°F]|7[12]|
|150°Cto 177 °C [301 °F to350°F]|8 [15]|
|177 °Cto 204 °C [351 °F to 400°F]|10 [18]|
|205 °C to 232 °C[401 °F to 450 °F]|11[20]|
|232 °C to 260 °C[451 °F to 500 °F]|14[25]|
Honeywell Sensing and Control 17
## **Commercial Thermostats**
**Table 23. 2450R/2455R/2450RC/2455RC/2450HR/2450RCH Series “One Shot” Specifications**
|**Characteristic**|**Parameter **|
|---|---|
|Switch type|SPST|
|Reset type|One Shot|
|Amperage|seeTable24|
|Voltage|120Vac to250Vac|
|Operating temperature range|2450R/2455R/2450HR/2450RCH: 52 °C to 150 °C [125 °F to 302 °F]<br>2450RC/2455RC:52 °C to260°C [125°Fto 500°F]|
|Environmental exposure range|2450R/2455R/2450HR/2450RCH: 17.8 °C to 177 °C [0 °F to 350 °F]<br>2450RC/2455RC: 17.8°Cto 287 °C [125°F to550°F]|
|Materials:<br>Base<br>Contacts<br>Terminals<br>Closure<br>Brackets|phenolic or ceramic<br>silver alloy<br>unplated brass, plated brass or steel<br>aluminum, brass, stainless steel<br>stainless steel|
|Approvals|UL FileE36103, CSA FileLR43279|
|Weight|6g [0.21 oz] (does not include brackets or lead wires)|
**Table 24. 2450R/2455R/2450RC/2455RC/2450HR/2450RCH Series “One Shot” Contact Ratings**
|**Cycles**|**120 Vac**|**240 Vac**|**277 Vac**|
|---|---|---|---|
|1|15 A resistive|10 A resistive|10 A resistive|
## **Notes:**
- Resets below -35 °C [-31 °F].
- Additional contact ratings are available. Please consult Honeywell.
## **Figure 17. 2450R/2455R/2450RC/2455RC/2450HR/2450RCH Series “One Shot” Basic Dimension**
**==> picture [120 x 8] intentionally omitted <==**
**----- Start of picture text -----**<br>
2450R/22450RC “One Shot”<br>**----- End of picture text -----**<br>
**==> picture [117 x 8] intentionally omitted <==**
**----- Start of picture text -----**<br>
2455R/2455RC “One Shot”<br>**----- End of picture text -----**<br>
## **2450HR “One Shot”**
**==> picture [95 x 7] intentionally omitted <==**
**----- Start of picture text -----**<br>
2450RCH “One Shot”<br>**----- End of picture text -----**<br>
18 www.honeywell.com/sensing
## **REDI-TEMP THERMOSTATS**
REDI-TEMP thermostats are pre-configured as shown and are readily available.
## **Figure 18. 3455RC REDI-TEMP Series (See page 6 for specifications and potential applications.)**
**==> picture [270 x 118] intentionally omitted <==**
**----- Start of picture text -----**<br>
3455RC B203S Moveable Bracket<br>23,80<br>32,26 [0.937]<br>[1.270]<br> 2X 3,56 DIA<br> [0.140]<br>17,55<br>[0.691]<br> 2X 1,7 DIA<br> [0.067]<br>31,19<br>[1.228]<br>11,9<br>0.51 [0.469]<br>[0.20]<br>**----- End of picture text -----**<br>
**Table 25. 3455RC REDI-TEMP Series Open on Rise**
**Table 26. 3455RC REDI-TEMP Series Close on Rise**
|**Catalog**<br>**Listing**<br>~~es~~|**Open**<br>**Temp.**<br>**°C[°F]**|**Open**<br>**Tolerance**<br>**°C[°F]**|**Close**<br>**Temp.**<br>**°C[°F]**<br>~~Os~~|**Close**<br>**Tolerance**<br>**°C[°F]**<br>~~Os~~|~~Os~~|**Catalog**<br>**Listing**<br>~~OO~~|**Close**<br>**Temp.**<br>**°C[°F]**<br>~~OO~~|**Close**<br>**Tolerance**<br>**°C[°F]**<br>~~OO~~|**Open**<br>**Temp.**<br>**°C[°F]**<br>~~OO~~|**Open**<br>**Tolerance**<br>**°C[°F]**<br>~~OO~~|
|---|---|---|---|---|---|---|---|---|---|---|
|**3455RC-100-220**<br>~~es~~|18 [65]<br>~~es~~|±3 [±5]|-1 [30]<br>~~Os~~<br>~~0~~|±5 [±8]<br>~~Os~~<br>~~0~~||**3455RC-100-243**<br>~~OO~~<br>~~OO~~|21[70]<br>~~OO~~<br>~~OO~~|±5[±8]<br>~~OO~~|2[35]<br>~~OO~~|±3[±5]<br>~~OO~~|
|**3455RC-100-221**<br>~~es~~<br>~~es~~|24 [75]<br>~~es~~<br>~~es~~<br>~~es~~|±3 [±5]<br>~~es~~|4 [40]<br>~~Os~~<br>~~es~~<br>~~0~~<br>~~Os~~|±5 [±8]<br>~~Os~~<br>~~es~~<br>~~0~~<br>~~Os~~|**3455RC-100-244**<br>32[90]<br>±5[±8]<br>16[60]<br>±3[±5]<br>**3455RC-100-245**<br>43[110]<br>±5[±8]<br>27[80]<br>±3[±5]<br>**3455RC-100-246**<br>54[130]<br>±5[±8]<br>38[100]<br>±3[±5]<br>**3455RC-100-247**<br>66[150]<br>±5[±8]<br>49[120]<br>±3[±5]<br>**3455RC-100-248**<br>77[170]<br>±5[±8]<br>60[140]<br>±3[±5]<br>**3455RC-100-249**<br>88[190]<br>±5[±8]<br>71[160]<br>±3[±5]<br>**3455RC-100-250**<br>99[210]<br>±5[±8]<br>82[180]<br>±4[±6]<br>**3455RC-100-251**<br>110[230]<br>±5[±8]<br>93[200]<br>±4[±6]<br>**Note:**Materials and contact ratings are the same as those for 2455RC.<br>~~OsOO~~<br>~~OO~~<br>~~OO~~<br>~~ss~~<br>~~Oe~~|**3455RC-100-244**<br>~~OO~~<br>~~OO~~<br>~~OO~~|32[90]<br>~~OO~~<br>~~OO~~<br>~~OO~~|±5[±8]<br>~~OO~~|16[60]<br>~~OO~~|±3[±5]<br>~~OO~~|
|**3455RC-100-222**<br>~~es~~|29 [85]<br>~~es~~<br>~~es~~<br>~~es~~<br>~~es~~|±3 [±5]<br>~~es~~<br>~~ee~~|13 [55]<br>~~0~~<br>~~es~~<br>~~Os~~<br>~~es~~|±5 [±8]<br>~~0~~<br>~~es~~<br>~~Os~~||**3455RC-100-245**<br>~~OO~~<br>~~OO~~<br>~~ss~~|43[110]<br>~~OO~~<br>~~OO~~<br>~~ss~~|±5[±8]<br>~~ss~~|27[80]<br>~~ss~~|±3[±5]<br>~~ss~~|
|**3455RC-100-223**<br>~~a~~|35 [95]<br>~~es~~<br>~~a~~<br>~~es~~<br>~~es ee~~|±3 [±5]<br>~~a~~<br>~~ee~~<br>~~ee~~|18 [65]<br>~~Os~~<br>~~a~~<br>~~es~~<br>~~se~~|±5 [±8]<br>~~Os~~<br>~~a~~<br>~~se~~||**3455RC-100-246**<br>~~OO~~<br>~~ss~~|54[130]<br>~~OO~~<br>~~ss~~|±5[±8]<br>~~ss~~|38[100]<br>~~ss~~|±3[±5]<br>~~ss~~|
|**3455RC-100-224**<br>~~es~~|41 [105]<br>~~es ~~<br>~~es~~<br>~~es ee~~<br>~~es ee~~|±3 [±5]<br> ~~ee ~~<br>~~es~~<br>~~ee~~<br>~~ee~~|24 [75]<br> ~~es~~<br>~~es~~<br>~~se~~<br>~~se~~|±5 [±8]<br>~~es~~<br>~~se~~<br>~~se~~||**3455RC-100-247**<br>~~ss~~|66[150]<br>~~ss~~|±5[±8]<br>~~ss~~|49[120]<br>~~ss~~|±3[±5]<br>~~ss~~|
|**3455RC-100-225**<br>~~es~~|46 [115]<br>~~es ee~~<br>~~es~~<br>~~es ee~~<br>~~es ee~~|±3 [±5]<br>~~ee ~~<br>~~es~~<br>~~ee~~<br>~~ee~~|29 [85]<br> ~~se~~<br>~~es~~<br>~~se~~<br>~~se~~|±5 [±8]<br>~~se~~<br>~~es~~<br>~~se~~<br>~~se~~||**3455RC-100-248**|77[170]|±5[±8]|60[140]|±3[±5]|
|**3455RC-100-226**<br>~~es~~|52 [125]<br>~~es ee~~<br>~~es~~<br>~~es ee~~<br>~~es ee~~|±3 [±5]<br>~~ee ~~<br>~~es~~<br>~~ee~~<br>~~ee~~|35 [95]<br> ~~se~~<br>~~es~~<br>~~se~~<br>~~se~~|±5 [±8]<br>~~se~~<br>~~es~~<br>~~se~~<br>~~se~~||**3455RC-100-249**|88[190]|±5[±8]|71[160]|±3[±5]|
|**3455RC-100-227**<br>~~es~~|57 [135]<br>~~es ee~~<br>~~es~~<br>~~es ee~~<br>~~es~~|±3 [±5]<br>~~ee ~~<br>~~es~~<br>~~ee~~<br>~~ee es~~|41 [105]<br> ~~se~~<br>~~es~~<br>~~se~~<br>~~es~~|±5 [±8]<br>~~se~~<br>~~es~~<br>~~se~~<br>~~Oe~~||**3455RC-100-250**|99[210]|±5[±8]|82[180]|±4[±6]|
|**3455RC-100-228**<br>~~es~~|63 [145]<br>~~es ee~~<br>~~es~~<br>~~es~~<br>~~ee~~|±3 [±5]<br>~~ee ~~<br>~~es~~<br>~~ee es~~<br>~~ee~~|46 [115]<br> ~~se~~<br>~~es~~<br>~~es~~|±5 [±8]<br>~~se~~<br>~~es~~<br>~~Oe~~||**3455RC-100-251**|110[230]|±5[±8]|93[200]|±4[±6]|
|**3455RC-100-229**<br>~~ee~~|68 [155]<br>~~es~~<br>~~ee~~<br>~~ee~~<br>~~es~~|±3 [±5]<br>~~ee es~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|52 [125]<br>~~es~~<br>~~ee~~<br>~~ee~~|±5 [±8]<br>~~Oe~~<br>~~ee~~|||||||
|**3455RC-100-230**<br>~~es~~|73 [165]<br>~~ee ~~<br>~~es~~<br>~~es~~<br>~~es~~|±3 [±5]<br> ~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~|57 [135]<br>~~es~~<br>~~ee~~<br>~~ee~~|±5 [±8]<br>~~es~~|||||||
|**3455RC-100-231**<br>~~es~~|79 [175]<br>~~es~~<br>~~es~~<br>~~es~~<br>~~es~~|±3 [±5]<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~|63 [145]<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~|±5 [±8]<br>~~es~~|||||||
|**3455RC-100-232**<br>~~es~~|85 [185]<br>~~es~~<br>~~es~~<br>~~es~~<br>~~ee~~|±3 [±5]<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~|68 [155]<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~|±5 [±8]<br>~~es~~<br>~~ee~~|||||||
|**3455RC-100-233**<br>~~ee~~|91 [195]<br>~~es~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|±3 [±5]<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|73 [165]<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|±5 [±8]<br>~~ee~~<br>~~ee~~|||||||
|**3455RC-100-234**<br>~~ee~~|96 [205]<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|±4 [±6]<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|79 [175]<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|±5 [±8]<br> ~~ee~~<br>~~ee~~|||||||
|**3455RC-100-235**<br>~~ee~~|102 [215]<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|±4 [±6]<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|85 [185]<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|±5 [±8]<br>~~ee~~|||||||
|**3455RC-100-236**<br>~~ee~~|107 [225]<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|±4 [±6]<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|91 [195]<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|±5 [±8]<br>~~ee~~|||||||
|**3455RC-100-237**<br>~~ee~~|113 [235]<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|±4 [±6]<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|96 [205]<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|±5 [±8]<br>~~ee~~|||||||
|**3455RC-100-238**<br>~~ee~~|118 [245]<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|±4 [±6]<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|102 [215]<br> ~~ee~~<br>~~ee~~<br>~~ee~~|±5 [±8]<br>~~ee~~|||||||
|**3455RC-100-239**<br>~~ee~~|124 [255]<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~es~~|±4 [±7]<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|107 [225]<br> ~~ee~~<br>~~ee~~<br>~~ee~~|±5 [±8]<br>~~ee~~|||||||
|**3455RC-100-240**<br>~~es~~|135 [275]<br>~~ee ~~<br>~~es~~<br>~~es~~<br>~~es~~|±4 [±7]<br> ~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~|118 [245]<br>~~es~~<br>~~ee~~<br>~~ee~~|±5 [±8]<br>~~es~~|||||||
|**3455RC-100-241**<br>~~es~~|146 [295]<br>~~es~~<br>~~es~~<br>~~es~~<br>~~ee~~|±4 [±7]<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~|129 [265]<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~|±5 [±8]<br>~~es~~|||||||
|**3455RC-100-242**<br>~~es~~|157 [315]<br>~~es~~<br>~~es~~<br>~~ee~~|±6 [±10]<br>~~ee~~<br>~~es~~<br>~~ee~~|135 [275]<br>~~ee~~<br>~~es~~<br>~~ee~~|±8 [±15]<br>~~es~~|||||||
Honeywell Sensing and Control 19
## **Commercial Thermostats**
## **MOUNTING HARDWARE**
**==> picture [522 x 477] intentionally omitted <==**
**----- Start of picture text -----**<br>
Figure 19. Brackets<br>B-201, B-201A, B-201B B-203, B-203A, B-203B B-205, B-205A<br>Stationary Surface Movable Surface Air Stream<br>16,00 DIA 20,62 DIA 20,62 DIA<br>(0.630) [0.812] [0.812] ®<br>30,15 LAG ! 33,20 1A | 30,15 LANA<br>[1.187] 23,80 11.300] 23,80 [1.187] 23,80<br>.<br>[0.937] Ch [0.937] 0.987] .<br>ay ©)<br>B-201B:-201A: 2 X 3,68 [0. (S{ _B-203:2 X 2,77 [0.109] DIA B-205: 2 X 2,77 [0.109] DIA<br> 2 X 3,18 [0.125] DIA E2034 2X'S6b [0.14 DIA BOOEA 2X 365 [o. 145] DIA<br>eee PO A Enclosed B Exposed<br>B-203S B-206 B-207<br>17,55 yj 34 [0.156]3,96<br>[0.691 7H [0.171] = | | kK<br>> an<br>: 43,05<br>31,19: 2) T 23,80 49,78: | \ 8B [1.695] | [1.343]34,11<br>!<br>AL : |<br>Q © :<br>J (1403,56 DIA i hT | ante| —_U 25.40 DIA[1.000] ! U/<br>B-209 B-210 B-212, B-212A<br>4}, j e 3,58<br> 8,71 R<br>a, | N [0.140] [0.343] (0.690)17,53 |<br>[1.217]30,91 B23,53°80 > G)><br>34,93<br>[1.375] ! 96.40<br>i 12,70 [1.000]<br>C| Q 1 (| CN [0.500]<br>: __ 2X 3,56 DIA Uy, CY<br>16,00 [0.140] ms |<br>11,10 2X 3,73 DIA<br>[0.630] | an<br>[0.437] [0.147] CSB-212: 2X 3,18 [0.125] DIA<br>3,18 1 B-212A: 2X 4,75 [0.187] DIA<br>[0.125]<br>B-213 B-230 B-239<br>**----- End of picture text -----**<br>
20 www.honeywell.com/sensing
**==> picture [382 x 173] intentionally omitted <==**
**----- Start of picture text -----**<br>
Figure 19. Brackets (Continued)<br>B-246 B-249 B-250<br>17,53 19,30<br>_<br>| ~ __<br>T [0.690] = era | — | (0.630) [1.000]<br>34,29<br>= 25,40<br>30,15 a7,08<br>11.487] [1.065]<br>3035<br>Pp a [ 0.880]<br>:<br>4,57 8&71R ost<br>oiso l ke [71] > 70.020), 2X 7,14 [0.280] DIA<br>2X 9,91 [0.390] DIA<br>B-264<br>**----- End of picture text -----**<br>
## **Figure 20. Brass Mounting Studs**
**==> picture [417 x 241] intentionally omitted <==**
**----- Start of picture text -----**<br>
B-220 : 6-32 B240<br>B-221: 8-32<br>B-222: 10-24 VA 15,88 DIA 6-32<br>( )- (0.825<br>B-223: 10-32 8-32<br>B-224: M3X0.5 10-32<br>B-225: M4X0.7 2,36, M3X0.5<br>B-226: M5X0.8 M4X0.7<br>B-227: M6X1.0 M5X0.8<br>ee [0.093]<br>s oo<br>1s7 h oor t 811 t [0.062]1572<br>[0.062] HH @)<br>© k K.<br>' (C)<br>A Undercut to minor diameter B Specify length C Specify thread<br>B-327 B-901 B-902<br>HEX 19 A/F L 7<br>Sape r' P G<br>11,0 4,1 Ft 5,0 41 F<br>[0.43] [0.062] [0.17] [0.062]<br>M4 X 0.7<br>**----- End of picture text -----**<br>
Honeywell Sensing and Control 21
## **Commercial Thermostats**
**==> picture [516 x 622] intentionally omitted <==**
**----- Start of picture text -----**<br>
Figure 21. Terminals<br>T-101 T-103 T-106 T-107<br>Horizontal Solder Special Vertical Solder Inside Vertical Solder Outside<br>ro] \_. T [0.187]4,75<br>| vas , EN t<br>19 46.22.86: e 1.978]34,93 4,75 Lo | 108561<br>4,75 - | ace 10.766] ies RS+ (11600) [0.080][0.187]2,03 DIA male4,50 [0.080] a 2,03475DIA = .<br>[ov er le\_ 2,03 DIA 4<br>[0.080] S (7 er<br>T-120 T-141 T-146 T-147<br>Special Horizontal Weld 1/4 in Quick Connect, Horizontal 1/4 in Quick Connect, Vertical<br>34,93<br>[1.375]<br>OF a 25,40 2~] ey] El [0.624]15,85<br>. [1.000] 22,86 M<br> 4,90 DIA a © 32,26<br>[0.193] 1,70 DIA<br>Syl [0.900] [1.270] [0.067] Kal |<br>4,70 DIA 8,64<br>(D 7 1,32 [0.052] Larey s, | [0.067] Md =Tf [0.340]<br>cyt 3,86 [0.152]<br>4.57 [0.180]<br>6.10 [0.240]<br>T-148 T-149 T-150 T-151<br>1/4 in Quick Connect, 45° 3/16 in Quick Connect, Flat 3/16 in Quick Connect. Vertical 3/16 in Quick Connect, 45°<br>terminal thickness = 0.5 mm [0.020 in] terminal thickness = 0.5 mm [0.020 in]<br>[se 1,70 DIA[0.067] | t ker eS (0084)<br>27,59 ( 1.45 4<br>[1.086]<br>45°<br>[0. L [0.322]<br>6,16<br>[0.242]<br>4 Fr SO E<br>.<br>T-161 T-162 T-164 T-165<br>top iN | l<br>4,75 i [0.040] Ott (Ot A [4.342]110,29 [2. 3398278]<br>[0.187] e y} 10147]42 [0.660]16,76 ft <3| 0<br>2.06 | [0.345]8,76<br>[0.081] j<br>2,36 t 2,36<br>[0.093]" (0693)1<br>T-168 T-169 T-170 T-178<br>12,70<br>? 1] [0.250 6,35] H o. 176 I {70.11 2,790} inee : [0.500]<br>& 1| Ht“ ate4161 f°] joovs] I 62,18<br>36,37 | 0457 6,35 -— -- (' \ [2.448]<br>t ' | 081 le] | c|<br>I w o128. n t h 1 020) i 3,18<br>2,79 [0.111] I [0.125]<br>[0.110] 4 , 27 2,79 a l lo<br>[0.050] [0.110] 1,27<br>[0.050]<br>**----- End of picture text -----**<br>
22 www.honeywell.com/sensing
**==> picture [484 x 286] intentionally omitted <==**
**----- Start of picture text -----**<br>
Figure 21. Terminals (Continued)<br>T-179 T-188 T-806 T-807<br>Vertical Weld Inside Vertical Weld Outside<br>AN f AN<br>a “| revo L 12,90 id 2,54 4,75 |<br>[0.508] [0.100]<br>| ots] [0.5012,7 ] 0 oa1 61 | mnJ [0.187]ooap a. [1.77]4,50 [0.487]475 iE<br>| 7 0865) F [0.080] o0aDAT<br>—t [0.080]<br>3,98<br>[1.57]<br>T-846 T-849 T-850 T-899<br>Horizontal 3/16 in Quick Connect, Flat 3/16 in Quick Connect, Vertical<br>terminal thickness = 0.8 mm [0.032 in] terminal thickness = 0.8 mm [0.032 in]<br>32,5<br>[1.28] 8,7<br>4,9 [0.34]<br>[0.19]<br>Hf E 14,78<br>1,37 + 1,37 DIA. Se d/ | 7<br>A [0.054]DIA nt [0.054] [0.322]¥<br>©) q aate<br>A = 2X threaded for M3 screw<br>**----- End of picture text -----**<br>
Honeywell Sensing and Control 23
## **[WARNING ]**
## **PERSONAL INJURY**
DO NOT USE these products as safety or emergency stop devices or in any other application where failure of the product could result in personal injury.
**Failure to comply with these instructions could result in death or serious injury.**
## **WARRANTY/REMEDY**
Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship. Honeywell’s standard product warranty applies unless agreed to otherwise by Honeywell in writing; please refer to your order acknowledgement or consult your local sales office for specific warranty details. If warranted goods are returned to Honeywell during the period of coverage, Honeywell will repair or replace, at its option, without charge those items it finds defective. **The foregoing is buyer’s sole remedy and is in lieu of all other warranties, expressed or implied, including those of merchantability and fitness for a particular purpose. In no event shall Honeywell be liable for consequential, special, or indirect damages.**
While we provide application assistance personally, through our literature and the Honeywell web site, it is up to the customer to determine the suitability of the product in the application.
Specifications may change without notice. The information we supply is believed to be accurate and reliable as of this printing. However, we assume no responsibility for its use.
## **WARNING**
## **MISUSE OF DOCUMENTATION**
- The information presented in this product sheet is for reference only. Do not use this document as a product installation guide.
- Complete installation, operation, and maintenance information is provided in the instructions supplied with each product.
**Failure to comply with these instructions could result in death or serious injury.**
## **SALES AND SERVICE**
Honeywell serves its customers through a worldwide network of sales offices, representatives and distributors. For application assistance, current specifications, pricing or name of the nearest Authorized Distributor, contact your local sales office or:
**E-mail:** info.sc@honeywell.com
**Internet:** www.honeywell.com/sensing
## **Phone and Fax:**
Asia Pacific +65 6355-2828 +65 6445-3033 Fax Europe +44 (0) 1698 481481 +44 (0) 1698 481676 Fax Latin America +1-305-805-8188 +1-305-883-8257 Fax USA/Canada +1-800-537-6945 +1-815-235-6847 +1-815-235-6545 Fax
Sensing and Control Honeywell
1985 Douglas Drive North Golden Valley, MN 55422
009053-2-EN IL50 GLO Printed in USA September 2009 Copyright © 2009 Honeywell International Inc. All rights reserved.
**www.honeywell.com**
Updated at April 28, 2026
Honeywell is a globally recognized leader in the design and manufacture of advanced sensing and switching solutions. Renowned for engineering components that deliver enhanced precision and ruggedness, Honeywell provides essential technologies for demanding applications across critical healthcare, aerospace, and industrial equipment. With a comprehensive portfolio built to address both basic and complex design challenges, the company stands at the forefront of reliable electronic component manufacturing. The core of our Honeywell offering is an extensive selection of high-performance sensors and transducers. This includes a robust lineup of pressure sensors and transducers engineered for accurate fluid and gas measurement in challenging environments. Furthermore, we provide a wide array of temperature sensors and specialized temperature sensing NTC thermistors designed for stable thermal management, alongside precision current sensors and load cells that deliver critical feedback for control systems. Beyond advanced sensing technology, Honeywell’s expertise extends to essential circuit protection and electromechanical components. Our selection encompasses power relays, thermal magnetic circuit breakers, and standard terminal blocks, ensuring safe and efficient power distribution. Whether integrating core components or sourcing specialized accessories, design engineers can rely on Honeywell for uncompromising quality and operational excellence.
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