# Thermostat Switch, Temperature Limiter, B12A Series, 80 °C, Normally Closed, Wire Leads

![Product image](https://novapart.co/image/farnell:2164286/)

**URL**: https://novapart.co/products/B12A8005L310100/thermostat-switch-temperature-limiter-b12a-series
**SKU**: B12A8005L310100
**Manufacturer**: MICROTHERM
**Category**: Sensors & Transducers || Sensors || Temperature Sensors || Thermostat Switches
**Price**: €2.8600
**Stock**: 10+
**Lead Time**: 50 days (indicative)

## Description

Switching Temperature:80°C; Reset Temperature:-; Contact Operation:Normally Closed; Sensor Terminals:-; Sensor Housing:-; Contact Rating:-; Product Range:-; SVHC:No SVHC (17-Dec-2015)

## Specifications

| Parameter | Value |
|---|---|
| Product Range | B12A Series |
| Contact Rating | - |
| Sensor Housing | - |
| Sensor Terminals | - |
| Contact Operation | Normally Closed |
| Reset Temperature | - |
| Switching Temperature | 80°C |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2164286/)

Thermal motor protector Temperature limiter Thermal cut-out 

12 13 

## Applications 

~~- Motors~~ 

~~- Transformers~~ 

~~- Coils~~ 

~~- Electronics, sensors~~ 

~~- Process Automation~~ 

Benefits - Non-sensitive to current - High current rating up to 30A - Manifold executions ~~- Special low voltage execution Ti |~~ 

## **Technical data** 

**control B12A / E B12B / G B13N / T type ratings** ~~rs ee~~ normally normally closed/ **version** normally closed open open **rated current at 250 V 50/60 Hz (cos φ 0.95 / 0.6 )** 6.3 A / 6.0 A 10.0 A / 6.0 A 5.0 A / 1.6 A 1...100 mA (24 Vdc) ~~a~~ **switching cycles under rated current** 10,000 5,000 5,000 10,000 **max. current under failure conditions at 250 V 50/60 Hz ( cos φ 0.95 )** 30.0 A - ~~SS~~ **switching cycles under max. current** 100 - **temperature rating Ta ( steps in 5 K )** 70 °C ... 190 °C 70 °C ... 160 °C 70 °C ... 155 °C 70 °C ... 160 / 155 °C ~~a~~ **tolerances** standard: ± 5 K **feature of automatic action** 1.B.M, 2.B, 1.C 1.B - ~~ee~~ **contact resistance ( incl. wire of 100 mm )** < 50 mΩ ~~a~~ **hysteresis** 30 K ± 15 K[1)] **dielectric strength ( standard insulation )** 2 kV - ~~—eeee——r~SX~X—————Se~~ **shock / vibration testing ( similar to EN 50155 )** 400 m/s[2] sine half wave / 100 m/s[2] 5 Hz ... 2.000 Hz sine **resistances to impregnation** tight against ordinary resins and lacquers ~~a~~ **degrees of protection provided by enclosures ( EN 60529 )** IP00 **suitable for use in protection category** I, II - **VDE / ENEC** EN 60730-1 / -2-9 ~~es~~ no approval **UL** UL 2111 / UL 873[2)] required to **approvals** voltage ratings **CSA / cUL** C22.2 No. 77 / C22.2 No. 24[2)] lower than 42 V **CQC** GB14536.1-1998 / GB14536.10-1996[2)] ~~iees~~ 1) at the Ta (upper and lower) limits the hysteresis could deviate         2) on request **Standard wire (length 100 ± 10 mm, stripped 6 ± 1 mm)** 

|**lead**|**code**|**temperature**<br>**max.**|**operating**<br>**voltage  max.**|**approx. diameter**<br>**insulation**|**approx. cross section**<br>**diameter2)**|**UL**<br>**style**|
|---|---|---|---|---|---|---|
|stranded<br>white|L3001)|150 °C|300 V|1.50 mm|AWG24 / 0.25 mm2|3398|
||L310|||1.82 mm|AWG20 / 0.50 mm2||
||L320|||2.10 mm|AWG18 / 1.00 mm2||
||L3601)|200 °C|600 V|1.20 mm|AWG24 / 0.25 mm2|10086|
||L370|||1.60 mm|AWG20 / 0.50 mm2||
||L380|||1.80 mm|AWG18 / 1.00 mm2||
|solid<br>yellow|L410|150 °C|300 V|1.66 mm|AWG20 / 0.80 mm|3398|
||L440|200 °C|300 V|1.54 mm|AWG20 / 0.80 mm|1332|



1[)] B13 only **[2) ] AWG20 is recommended** 

## **Standard insulation** 

**==> picture [548 x 144] intentionally omitted <==**

**----- Start of picture text -----**<br>
|||||||
|---|---|---|---|---|---|
|control|drawing|technical|
|nc|no|code|illustration|approvals|[1)]|
|type|dimensions ( mm )|specifi cation|
|B12|A|B|
|shrink cap|VDE, UL,|
|U253|
|potted|cUL|
|B13|N|T|
|.|
|awe|ca. 19|
|100|+10|
|B12|A|B|
|cap of PPS|VDE, UL,|
|U186|
|potted|cUL|
|B13|N|T|

**----- End of picture text -----**<br>


## **Specific variations** 

**==> picture [548 x 427] intentionally omitted <==**

**----- Start of picture text -----**<br>
|||||||
|---|---|---|---|---|---|
|control|drawing|technical|
|nc|no|code|illustration|approvals|[1)]|
|type|dimensions ( mm )|specifi cation|
|B12|A|B|
|not insulated|VDE, UL,|
|potted|cUL, CSA|
|B13|N|T|
|B12|A|B|
|coated|VDE, UL,|
|U112|
|B13|N|T|Ta max. 160°C|cUL|
|10.|100|+10|
|housing of PPS|
|B12|A|B|
|potted|VDE, UL,|
|U294|a|cUL|
|B13|N|T|
|‘ie{i [=—Va|Ta max. 160°C|
|B12|A|B|
|not insulated|VDE, UL,|
|A800|
|potted|cUL|
|B13|N|T|
|—|
|aluminium housing|
|B12|E|G|thread M4x6|
|VDE, UL,|
|G402|potted|
|cUL|
|B13|N|T|
|Ta max. 150 °C|
|||OF100|+10|
|brass housing|
|B12|E|G|thread M4x5|
|VDE, UL,|
|G714|potted|
|cUL|
|B13|N|T|
|Ta max. 150 °C|

**----- End of picture text -----**<br>


1) B12 only 

## **Heating by current** 

**==> picture [192 x 129] intentionally omitted <==**

**----- Start of picture text -----**<br>
2<br>0 ———<br>0 2 4<br>current [A]<br>self-heating  [K]<br>**----- End of picture text -----**<br>


**==> picture [19 x 8] intentionally omitted <==**

**----- Start of picture text -----**<br>
B12<br>**----- End of picture text -----**<br>


The diagram is measured with a thermal control without any insulation in an oil bath. 

## Attention: 

The heating depends on the thermal conduction of the control to the equipment or part which should be protected. 

## **Ordering and marking example** 

## **Ordering example** 

**B12    A    120    05   L310   100   U253** shrink cap insulation length 100 mm lead wire white, AWG20 tolerance temperature normally closed type 

## **Marking** 

**B12A** type (B12 nc) 

**12005** response temperature (120°C), tolerance (± 5K) 

**051D** date of manufacture (May 2011), country (D=Germany) 

## Representation office: 

**Microtherm GmbH** Fon: +49 (0)7231 787-0 Täschenwaldstraße 3 Fax : +49 (0)7231 787-155 Postfach 1208 E-Mail: info@microtherm.de D-75112 Pforzheim Internet: www.microtherm.de 

Deviations from standard controls on request. 

05.2011  Technical subject to change without notice ~~SFE OOO~~ 



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- [Supplier page](https://es.farnell.com/microtherm/b12a8005l310100/thermal-switch-nc-80-deg/dp/2164286)
---

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