# NTC Thermistor, 68 kohm, 3950 K, Free Hanging, Wire Leaded, -30 °C to 105 °C, NRG Series

![Product image](https://novapart.co/image/farnell:4133826/)

**URL**: https://novapart.co/products/NRG1684H3950B1H/ntc-thermistor-68-kohm-3950-k-free-hanging-wire
**SKU**: NRG1684H3950B1H
**Manufacturer**: EATON BUSSMANN
**Price**: €0.8410
**Stock**: 10+
**Lead Time**: 99 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | To Be Advised |
| B-Constant | 3950K |
| Lead Length | 300mm |
| Ntc Mounting | Free Hanging |
| Ntc Case Size | - |
| Product Range | NRG Series |
| Qualification | - |
| Probe Diameter | - |
| Probe Material | - |
| Thermistor Type | Ring Lug, Bead |
| Resistance (25°C) | 68kohm |
| Thermistor Mounting | Free Hanging |
| B-Constant Tolerance | ± 3% |
| Thermistor Terminals | Wire Leaded |
| Operating Temperature Max | 105°C |
| Operating Temperature Min | -30°C |
| Resistance Tolerance (25°C) | ± 3% |
| Thermal Time Constant (In Air) | 9s |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4133826/)

Technical Data **ELX1225** Effective July 2022 

## NRG 

## Epoxy sealed radial lead NTC thermistor 

## **Applications** 

- Industrial Process Control 

- Commercial appliances 

- Battery, supercapacitor and energy storage systems 

- Uninterruptible power supplies 

- Consumer appliances 

- Medical devices 

## **Product features** 

- Epoxy sealed radial NTC thermistor 

- Temperature sensing, quick response time 

- Bead with ring lug 

- Wide resistance range：1 k Ω to 470 k Ω 

- Non-linear change in resistance vs temperature 

## **Packaging information** 

- Bulk, Type 3: 250 parts per poly bag 

- Heating, ventilation and air conditioning, Refrigeration (HVACR) 

- Food service equipment 

- IoT 

- White goods/household appliances 

- Computer and peripheral products 

## **Environmental compliance and general specifications** 

**==> picture [55 x 22] intentionally omitted <==**

**----- Start of picture text -----**<br>
HALOGEN<br>Pb HF<br>FREE<br>**----- End of picture text -----**<br>


- Bulk, Others: 500 parts per poly bag 

**Table 1. Part numbering** 

**==> picture [475 x 143] intentionally omitted <==**

**----- Start of picture text -----**<br>
NRG   a xxy   b  xxxx  Bx  c  x<br>Family name<br>NRG Rin 1/2/3/  (See mechanical  g lug type Beta type code Lead st Different lead   yle<br>parameters for details) B1 = 25/50, B2 = 25/85 dimensions<br>Resistance<br>xxy= x.x * 10 [y]  Ω Beta value Beta tolerance code<br>ex: 103 = 1.0 * 10 [3]  = 1000 Ω F = ±1%, G = ±2%,<br>ex: 3465, 4215, etc<br>H = ±3%<br>Resistance tolerance code<br>F = ±1%, H = ±3%<br>**----- End of picture text -----**<br>


See electrical specification table for option details 

NRG Epoxy sealed radial lead NTC thermistor 

Technical Data ELX1225 Effective July 2022 

## **Mechanical parameters- mm** 

## **Lug type 1** 

## **Lug type 2** 

## **Lug type 3** 

• 26AWG black Insulated lead wire with terminals tinned 

2 

www.eaton.com/electronics 

Technical Data ELX1225 Effective July 2022 

## NRG Epoxy sealed radial lead NTC thermistor 

## **Electrical specifications** 

|**Part number**|**Zero power**<br>**resistance**<br>**@ 25°C**<br>**R25(kΩ)**|**Zero power**<br>**resistance**<br>**@ 25°C**<br>**R25(kΩ)**|**Ring lug type**<br>**(Part**<br>**number code)**|**Ring lug type**<br>**(Part**<br>**number code)**||**R25**<br>**Tolerance**<br>**(Part number**<br>**code)**||**Beta type**<br>**(Part**<br>**number**<br>**code)**||**Beta**<br>**value**<br>**(K)**||**Beta**<br>**tolerance**<br>**(Part number**<br>**code)**||**Maximum**<br>**power**<br>**@ +25°C**<br>**Pmax(mW)**||**Dissipation**<br>**factor**<br>**(mW/°C)**|**Thermal**<br>**time**<br>**constant**<br>**T (second)**||**Operation**<br>**temperature**<br>**TL~TU(°C)**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|NRGa103bxxxxBxc|1||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||3435||±2% (G), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa683bxxxxBxc|6.8||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||3470||±2% (G), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa683bxxxxBxc|6.8||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||3975||±2% (G), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa104bxxxxBxc|10||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||3435||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa104bxxxxBxc|10||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||3975||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa203bxxxxBxc|2||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||3435||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa224bxxxxBxc|22||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||3740||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa334bxxxxBxc|33||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||3975||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa474bxxxxBxc|47||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||4090||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa504bxxxxBxc|50||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||3950||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa504bxxxxBxc|50||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||4050||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa105bxxxxBxc|100||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||4000||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa105bxxxxBxc|100||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||4190||±2% (G), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa105bxxxxBxc|100||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||4360||±2% (G), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa475bxxxxBxc|470||(1), (2), (3)|||±1% (F) ,±3% (H)||25/85 (B2)||4570||±2% (G), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa203bxxxxBxc|2||(1), (2), (3)|||±1% (F) ,±3% (H)||25/50 (B1)||3380||±2% (G), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa503bxxxxBxc|5||(1), (2), (3)|||±1% (F) ,±3% (H)||25/50 (B1)||3420||±2% (G), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa503bxxxxBxc|5||(1), (2), (3)|||±1% (F) ,±3% (H)||25/50 (B1)||3900||±2% (G), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa104bxxxxBxc|10||(1), (2), (3)|||±1% (F) ,±3% (H)||25/50 (B1)||3380||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa104bxxxxBxc|10||(1), (2), (3)|||±1% (F) ,±3% (H)||25/50 (B1)||4000||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa104bxxxxBxc|10||(1), (2), (3)|||±1% (F) ,±3% (H)||25/50 (B1)||3950||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa684bxxxxBxc|68||(1), (2), (3)|||±1% (F) ,±3% (H)||25/50 (B1)||3950||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa224bxxxxBxc|22||(1), (2), (3)|||±1% (F) ,±3% (H)||25/50 (B1)||3700||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa474bxxxxBxc|47||(1), (2), (3)|||±1% (F) ,±3% (H)||25/50 (B1)||3950||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa474bxxxxBxc|47||(1), (2), (3)|||±1% (F) ,±3% (H)||25/50 (B1)||4020||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa105bxxxxBxc|100||(1), (2), (3)|||±1% (F) ,±3% (H)||25/50 (B1)||3950||±1% (F), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa105bxxxxBxc|100||(1), (2), (3)|||±1% (F) ,±3% (H)||25/50 (B1)||4120||±2% (G), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||
|NRGa225bxxxxBxc|220||(1), (2), (3)|||±1% (F) ,±3% (H)||25/50 (B1)||4370||±2% (G), ±3% (H)||50||≥ 2.5 (type3)|≤ 10 (type3)||-30 to +105|
|||||||||||||||||≥ 3.0 (others)|≤ 9 (others)|||



a= Enter ring lug type from table above (1, 2, 3) See Mechanical parameters for lug type details 

b= Enter resistance tolerance code from table above (F = ±1%, H = ±3%) 

Bx= Enter Beta type code from table above (B1 = 25/50, B2 = 25/85) 

c= Enter Beta tolerance code from table above (F = ±1%, G = ±2%, H = ±3%) 

3 

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NRG Epoxy sealed radial lead NTC thermistor 

Technical Data ELX1225 Effective July 2022 

## **Temperature characteristics** 

|**Part number**|**NRG103**||**NRG203**||**NRG104**|**NRG104**||**NRG224**||**NRG334**|||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||**3435**||**3435**||**3435**|**3975**||**3740**||**3975**|||||
|**B type**|**B25/85**||**B25/85**||**B25/85**|**B25/85**||**B25/85**||**B25/85**|||||
|**Temperature**|**Resistance**||**Resistance**||**Resistance**|**Resistance**||**Resistance**||**Resistance**|||||
|**(°C)**|**(kΩ)**||**(kΩ)**||**(kΩ)**|**(kΩ)**||**(kΩ)**||**(kΩ)**|||||
|-40|20.08||95||325|39.5||575||1116.42|||||
|-39|19.14||91.71||304.83|37.47||541.35||1045.23|||||
|-38|18.24||88.53||286.01|35.55||509.86||978.99|||||
|-37|17.38||85.46||268.45|33.74||480.37||917.34|||||
|-36|16.56||82.51||252.06|32.03||452.75||859.93|||||
|-35|15.78||79.66||236.76|30.41||426.86||806.46|||||
|-34|15.04||76.9||222.47|28.88||402.6||756.62|||||
|-33|14.33||74.25||209.11|27.43||379.85||710.15|||||
|-32|13.66||71.69||196.63|26.05||358.5||666.81|||||
|-31|13.01||69.22||184.95|24.76||338.48||626.37|||||
|-30|12.4||66.84||174.03|23.53||319.68||588.62|||||
|-29|11.82||64.54||163.82|22.36||302.02||553.36|||||
|-28|11.26||62.32||154.25|21.26||285.44||520.42|||||
|-27|10.73||60.18||145.3|20.22||269.86||489.64|||||
|-26|10.23||58.11||136.91|19.23||255.21||460.85|||||
|-25|9.75||56.12||129.05|18.3||241.44||433.93|||||
|-24|9.29||54.19||121.68|17.41||228.49||408.73|||||
|-23|8.85||52.34||114.78|16.57||216.3||385.14|||||
|-22|8.44||50.54||108.3|15.77||204.83||363.06|||||
|-21|8.04||48.81||102.22|15.02||194.03||342.36|||||
|-20|7.67||47.14||96.51|14.3||183.86||322.97|||||
|-19|7.31||45.53||91.15|13.62||174.28||304.79|||||
|-18|6.96||43.97||86.12|12.98||165.24||287.74|||||
|-17|6.64||42.47||81.4|12.37||156.73||271.74|||||
|-16|6.33||41.02||76.95|11.79||148.7||256.72|||||
|-15|6.03||39.62||72.78|11.24||141.13||242.62|||||
|-14|5.75||38.27||68.85|10.72||133.98||229.37|||||
|-13|5.49||36.96||65.16|10.22||127.23||216.93|||||
|-12|5.23||35.7||61.68|9.75||120.86||205.23|||||
|-11|4.99||34.49||58.41|9.31||114.85||194.23|||||
|-10|4.76||33.31||55.33|8.88||109.16||183.88|||||
|-9|4.54||32.18||52.42|8.48||103.79||174.15|||||
|-8|4.33||31.08||49.69|8.1||98.71||164.98|||||
|-7|4.13||30.03||47.11|7.73||93.91||156.35|||||
|-6|3.94||29||44.68|7.39||89.37||148.22|||||
|-5|3.76||28.02||42.39|7.06||85.07||140.56|||||
|-4|3.59||27.07||40.23|6.74||81||133.34|||||
|-3|3.42||26.15||38.19|6.45||77.15||126.54|||||
|-2|3.27||25.26||36.27|6.16||73.5||120.12|||||
|-1|3.12||24.4||34.45|5.89||70.05||114.06|||||
|0|2.98||23.57||32.73|5.64||66.78||108.34|||||
|1|2.85||22.77||31.11|5.39||63.67||102.94|||||
|2|2.72||22||29.58|5.16||60.73||97.84|||||
|3|2.6||21.26||28.13|4.94||57.94||93.02|||||
|4|2.48||20.54||26.76|4.73||55.29||88.47|||||
|5|2.37||19.84||25.46|4.53||52.78||84.17|||||
|6|2.27||19.17||24.23|4.34||50.4||80.1|||||
|7|2.17||18.52||23.07|4.16||48.14||76.25|||||
|8|2.07||17.89||21.97|3.98||45.99||72.6|||||
|9|1.98||17.29||20.93|3.82||43.94||69.15|||||
|10|1.89||16.71||19.95|3.66||42||65.89|||||
|11|1.81||16.14||19.01|3.51||40.16||62.8|||||
|12|1.73||15.6||18.13|3.37||38.41||59.87|||||
|13|1.66||15.07||17.29|3.23||36.74||57.09|||||
|14|1.59||14.56||16.49|3.1||35.16||54.46|||||
|15|1.52||14.07||15.74|2.98||33.65||51.96|||||
|16|1.46||13.6||15.02|2.86||32.21||49.59|||||
|17|1.4||13.14||14.34|2.74||30.85||47.35|||||
|18|1.34||12.7||13.7|2.64||29.54||45.21|||||



4 

www.eaton.com/electronics 

Technical Data ELX1225 Effective July 2022 

NRG Epoxy sealed radial lead NTC thermistor 

## **Temperature characteristics, cont.** 

|**Part number**|**NRG103**||**NRG203**||**NRG104**||**NRG104**||**NRG224**||**NRG334**|||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||**3435**||**3435**||**3435**||**3975**||**3740**||**3975**|||||
|**B type**|**B25/85**||**B25/85**||**B25/85**||**B25/85**||**B25/85**||**B25/85**|||||
|**Temperature**|**Resistance**||**Resistance**||**Resistance**||**Resistance**||**Resistance**||**Resistance**|||||
|**(°C)**|**(kΩ)**||**(kΩ)**||**(kΩ)**||**(kΩ)**||**(kΩ)**||**(kΩ)**|||||
|19|1.28||12.27||13.09||2.53||28.3||43.19|||||
|20|1.23||11.86||12.5||2.43||27.12||41.27|||||
|21|1.18||11.46||11.95||2.34||26||39.44|||||
|22|1.13||11.08||11.43||2.25||24.93||37.71|||||
|23|1.09||10.7||10.93||2.16||23.9||36.06|||||
|24|1.04||10.35||10.45||2.08||22.93||34.49|||||
|25|1||10||10||2||22||33|||||
|26|0.9603||9.67||9.57||1.92||21.11||31.58|||||
|27|0.9224||9.34||9.16||1.85||20.27||30.23|||||
|28|0.8862||9.03||8.77||1.78||19.46||28.95|||||
|29|0.8517||8.73||8.4||1.72||18.69||27.73|||||
|30|0.8188||8.44||8.05||1.65||17.95||26.56|||||
|31|0.7873||8.16||7.71||1.59||17.25||25.45|||||
|32|0.7573||7.89||7.39||1.54||16.57||24.4|||||
|33|0.7287||7.62||7.09||1.48||15.93||23.39|||||
|34|0.7013||7.37||6.8||1.43||15.32||22.43|||||
|35|0.6752||7.13||6.52||1.38||14.73||21.52|||||
|36|0.6502||6.89||6.25||1.33||14.17||20.64|||||
|37|0.6263||6.66||6||1.28||13.63||19.81|||||
|38|0.6035||6.44||5.76||1.23||13.12||19.02|||||
|39|0.5817||6.23||5.53||1.19||12.63||18.26|||||
|40|0.5608||6.03||5.31||1.15||12.15||17.54|||||
|41|0.5409||5.83||5.1||1.11||11.7||16.84|||||
|42|0.5218||5.64||4.9||1.07||11.27||16.18|||||
|43|0.5036||5.45||4.71||1.04||10.86||15.55|||||
|44|0.4861||5.27||4.53||1||10.46||14.95|||||
|45|0.4693||5.1||4.35||0.9668||10.08||14.37|||||
|46|0.4533||4.94||4.19||0.9345||9.72||13.82|||||
|47|0.438||4.78||4.03||0.9034||9.37||13.3|||||
|48|0.4233||4.62||3.87||0.8736||9.04||12.79|||||
|49|0.4092||4.47||3.73||0.8449||8.72||12.31|||||
|50|0.3957||4.33||3.59||0.8173||8.41||11.85|||||
|51|0.3827||4.19||3.45||0.7908||8.11||11.41|||||
|52|0.3703||4.05||3.33||0.7653||7.83||10.99|||||
|53|0.3584||3.92||3.2||0.7408||7.56||10.58|||||
|54|0.347||3.8||3.09||0.7173||7.3||10.19|||||
|55|0.336||3.67||2.97||0.6946||7.05||9.82|||||
|56|0.3255||3.56||2.87||0.6728||6.81||9.47|||||
|57|0.3154||3.44||2.76||0.6518||6.58||9.13|||||
|58|0.3057||3.34||2.66||0.6315||6.35||8.8|||||
|59|0.2963||3.23||2.57||0.6121||6.14||8.49|||||
|60|0.2874||3.13||2.48||0.5933||5.94||8.19|||||
|61|0.2788||3.03||2.39||0.5753||5.74||7.9|||||
|62|0.2705||2.93||2.31||0.5579||5.55||7.62|||||
|63|0.2625||2.84||2.23||0.5411||5.37||7.36|||||
|64|0.2549||2.75||2.15||0.525||5.19||7.1|||||
|65|0.2475||2.67||2.08||0.5094||5.02||6.86|||||
|66|0.2404||2.59||2||0.4944||4.86||6.62|||||
|67|0.2336||2.51||1.94||0.4799||4.7||6.4|||||
|68|0.227||2.43||1.87||0.4659||4.55||6.18|||||
|69|0.2207||2.35||1.81||0.4525||4.41||5.97|||||
|70|0.2146||2.28||1.75||0.4395||4.27||5.77|||||
|71|0.2087||2.21||1.69||0.4269||4.13||5.58|||||
|72|0.203||2.14||1.63||0.4148||4.01||5.39|||||
|73|0.1976||2.08||1.58||0.4031||3.88||5.21|||||
|74|0.1923||2.02||1.53||0.3919||3.76||5.04|||||
|75|0.1872||1.96||1.48||0.381||3.64||4.88|||||
|76|0.1823||1.9||1.43||0.3704||3.53||4.72|||||
|77|0.1776||1.84||1.38||0.3603||3.43||4.57|||||



5 

www.eaton.com/electronics 

NRG Epoxy sealed radial lead NTC thermistor 

Technical Data ELX1225 Effective July 2022 

## **Temperature characteristics, cont.** 

|**Part number**|**NRG103**||**NRG203**|**NRG104**||**NRG104**||**NRG224**||**NRG334**|||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||**3435**||**3435**|**3435**||**3975**||**3740**||**3975**|||||
|**B type**|**B25/85**||**B25/85**|**B25/85**||**B25/85**||**B25/85**||**B25/85**|||||
|**Temperature**|**Resistance**||**Resistance**|**Resistance**||**Resistance**||**Resistance**||**Resistance**|||||
|**(°C)**|**(kΩ)**||**(kΩ)**|**(kΩ)**||**(kΩ)**||**(kΩ)**||**(kΩ)**|||||
|78|0.173||1.79|1.34||0.3504||3.32||4.42|||||
|79|0.1686||1.73|1.3||0.3409||3.22||4.28|||||
|80|0.1643||1.68|1.26||0.3318||3.12||4.14|||||
|81|0.1602||1.63|1.22||0.3229||3.03||4.01|||||
|82|0.1562||1.59|1.18||0.3143||2.94||3.89|||||
|83|0.1524||1.54|1.14||0.306||2.85||3.77|||||
|84|0.1487||1.49|1.11||0.298||2.77||3.65|||||
|85|0.1451||1.45|1.07||0.2902||2.69||3.54|||||
|86|0.1416||1.41|1.04||0.2827||2.61||3.43|||||
|87|0.1383||1.37|1.01||0.2754||2.54||3.32|||||
|88|0.135||1.33|0.9764||0.2684||2.46||3.22|||||
|89|0.1319||1.29|0.947||0.2615||2.39||3.12|||||
|90|0.1288||1.26|0.9185||0.2549||2.32||3.03|||||
|91|0.1259||1.22|0.8911||0.2486||2.26||2.94|||||
|92|0.123||1.19|0.8647||0.2424||2.2||2.85|||||
|93|0.1202||1.15|0.8391||0.2364||2.13||2.77|||||
|94|0.1176||1.12|0.8145||0.2305||2.07||2.68|||||
|95|0.115||1.09|0.7907||0.2249||2.02||2.61|||||
|96|0.1124||1.06|0.7678||0.2194||1.96||2.53|||||
|97|0.11||1.03|0.7456||0.2141||1.91||2.46|||||
|98|0.1076||1|0.7242||0.209||1.86||2.39|||||
|99|0.1053||0.9775|0.7035||0.204||1.81||2.32|||||
|100|0.1031||0.9513|0.6835||0.1992||1.76||2.25|||||
|101|0.1009||0.926|0.6641||0.1945||1.71||2.19|||||
|102|0.0988||0.9014|0.6455||0.19||1.66||2.12|||||
|103|0.0968||0.8777|0.6274||0.1856||1.62||2.07|||||
|104|0.0948||0.8547|0.61||0.1813||1.58||2.01|||||
|105|0.0929||0.8324|0.5931||0.1771||1.54||1.95|||||



6 

www.eaton.com/electronics 

Technical Data ELX1225 Effective July 2022 

NRG Epoxy sealed radial lead NTC thermistor 

## **Temperature characteristics** 

|**Part number**||**NRG105**||**NRG105**||**NRG105**|**NRG203**||**NRG104**||**NRG104**|
|---|---|---|---|---|---|---|---|---|---|---|---|
|||**4000**||**4190**||**4360**|**3380**||**3380**||**4000**|
|**B type**||**B25/85**||**B25/85**||**B25/85**|**B25/50**||**B25/50**||**B25/50**|
|**Temperature**||**Resistance**||**Resistance**||**Resistance**|**Resistance**||**Resistance**||**Resistance**|
|**(°C)**||**(kΩ)**||**(kΩ)**||**(kΩ)**|**(kΩ)**||**(kΩ)**||**(kΩ)**|
|-40||3100||3300||3600|39.8||195||325|
|-39||2910.56||3098.57||3377.19|37.69||184.63||305.06|
|-38||2733.69||2910.37||3169.14|35.71||174.87||286.45|
|-37||2568.5||2734.47||2974.79|33.84||165.67||269.05|
|-36||2414.17||2570.02||2793.19|32.07||157.01||252.8|
|-35||2269.93||2416.23||2623.47|30.41||148.84||237.61|
|-34||2135.07||2272.35||2464.78|28.84||141.14||223.4|
|-33||2008.93||2137.7||2316.37|27.36||133.89||210.11|
|-32||1890.9||2011.65||2177.54|25.96||127.04||197.67|
|-31||1780.43||1893.63||2047.63|24.64||120.58||186.03|
|-30||1677||1783.07||1926.02|23.39||114.48||175.13|
|-29||1580.12||1679.48||1812.16|22.21||108.73||164.93|
|-28||1489.35||1582.39||1705.51|21.1||103.29||155.36|
|-27||1404.26||1491.36||1605.61|20.05||98.15||146.4|
|-26||1324.49||1405.99||1511.98|19.05||93.3||138|
|-25||1249.66||1325.9||1424.22|18.11||88.71||130.12|
|-24||1179.46||1250.74||1341.93|17.22||84.38||122.73|
|-23||1113.57||1180.2||1264.74|16.38||80.28||115.8|
|-22||1051.7||1113.95||1192.33|15.58||76.39||109.29|
|-21||993.6||1051.74||1124.38|14.83||72.72||103.18|
|-20||939.01||993.29||1060.59|14.11||69.25||97.44|
|-19||887.7||938.35||1000.7|13.44||65.96||92.04|
|-18||839.47||886.71||944.44|12.8||62.84||86.98|
|-17||794.11||838.15||891.6|12.19||59.88||82.21|
|-16||751.44||792.48||841.93|11.62||57.09||77.74|
|-15||711.28||749.5||795.25|11.07||54.43||73.52|
|-14||673.48||709.06||751.36|10.56||51.92||69.56|
|-13||637.88||670.98||710.08|10.07||49.53||65.83|
|-12||604.36||635.13||671.25|9.6||47.27||62.32|
|-11||572.77||601.36||634.7|9.16||45.12||59.01|
|-10||542.99||569.54||600.31|8.74||43.08||55.9|
|-9||514.92||539.56||567.93|8.35||41.15||52.96|
|-8||488.45||511.29||537.44|7.97||39.31||50.2|
|-7||463.47||484.63||508.71|7.61||37.56||47.59|
|-6||439.9||459.49||481.65|7.27||35.9||45.13|
|-5||417.65||435.77||456.14|6.95||34.33||42.81|
|-4||396.65||413.38||432.1|6.64||32.83||40.62|
|-3||376.81||392.25||409.42|6.35||31.4||38.56|
|-2||358.06||372.29||388.04|6.07||30.05||36.61|
|-1||340.35||353.45||367.87|5.81||28.76||34.77|
|0||323.6||335.65||348.83|5.56||27.53||33.03|
|1||307.76||318.82||330.86|5.32||26.36||31.38|
|2||292.78||302.92||313.9|5.09||25.25||29.83|
|3||278.61||287.88||297.88|4.88||24.19||28.36|
|4||265.2||273.67||282.74|4.67||23.18||26.97|
|5||252.5||260.22||268.45|4.48||22.22||25.66|
|6||240.48||247.49||254.93|4.29||21.3||24.42|
|7||229.09||235.44||242.16|4.11||20.43||23.24|
|8||218.3||224.04||230.09|3.94||19.59||22.13|
|9||208.07||213.25||218.66|3.78||18.8||21.07|
|10||198.37||203.02||207.86|3.63||18.04||20.07|
|11||189.18||193.33||197.64|3.48||17.32||19.13|
|12||180.46||184.15||187.96|3.34||16.63||18.23|
|13||172.19||175.45||178.81|3.21||15.97||17.38|
|14||164.33||167.2||170.13|3.08||15.34||16.57|
|15||156.88||159.38||161.92|2.96||14.73||15.81|
|16||149.81||151.96||154.14|2.84||14.16||15.08|
|17||143.08||144.92||146.77|2.73||13.61||14.4|
|18||136.7||138.24||139.78|2.62||13.09||13.74|



www.eaton.com/electronics 7 

NRG Epoxy sealed radial lead NTC thermistor 

Technical Data ELX1225 Effective July 2022 

## **Temperature characteristics, cont.** 

|**Part number**||**NRG105**||**NRG105**|**NRG105**||**NRG203**||**NRG104**||**NRG104**|
|---|---|---|---|---|---|---|---|---|---|---|---|
|||**4000**||**4190**|**4360**||**3380**||**3380**||**4000**|
|**B type**||**B25/85**||**B25/85**|**B25/85**||**B25/50**||**B25/50**||**B25/50**|
|**Temperature**||**Resistance**||**Resistance**|**Resistance**||**Resistance**||**Resistance**||**Resistance**|
|**(°C)**||**(kΩ)**||**(kΩ)**|**(kΩ)**||**(kΩ)**||**(kΩ)**||**(kΩ)**|
|19||130.63||131.9|133.16||2.52||12.58||13.12|
|20||124.87||125.87|126.88||2.42||12.1||12.53|
|21||119.38||120.16|120.93||2.33||11.65||11.97|
|22||114.17||114.73|115.28||2.24||11.21||11.44|
|23||109.21||109.57|109.92||2.16||10.79||10.94|
|24||104.49||104.66|104.83||2.08||10.38||10.46|
|25||100||100|100||2||10||10|
|26||95.73||95.57|95.41||1.93||9.63||9.57|
|27||91.66||91.35|91.06||1.85||9.28||9.15|
|28||87.78||87.34|86.92||1.79||8.94||8.76|
|29||84.09||83.53|82.99||1.72||8.62||8.39|
|30||80.57||79.9|79.26||1.66||8.31||8.03|
|31||77.21||76.45|75.71||1.6||8.01||7.69|
|32||74.02||73.16|72.34||1.54||7.72||7.37|
|33||70.97||70.02|69.13||1.49||7.45||7.06|
|34||68.06||67.04|66.07||1.44||7.19||6.77|
|35||65.29||64.2|63.17||1.39||6.94||6.49|
|36||62.64||61.49|60.41||1.34||6.69||6.22|
|37||60.12||58.91|57.78||1.29||6.46||5.97|
|38||57.71||56.45|55.27||1.25||6.24||5.72|
|39||55.41||54.1|52.89||1.2||6.03||5.49|
|40||53.21||51.86|50.62||1.16||5.82||5.27|
|41||51.11||49.73|48.46||1.12||5.62||5.06|
|42||49.1||47.69|46.4||1.09||5.43||4.86|
|43||47.18||45.75|44.43||1.05||5.25||4.67|
|44||45.35||43.89|42.56||1.01||5.08||4.48|
|45||43.6||42.12|40.78||0.9809||4.91||4.31|
|46||41.92||40.43|39.08||0.9487||4.75||4.14|
|47||40.32||38.81|37.45||0.9178||4.59||3.98|
|48||38.78||37.27|35.91||0.8881||4.44||3.83|
|49||37.32||35.79|34.43||0.8595||4.3||3.68|
|50||35.91||34.38|33.02||0.832||4.16||3.54|
|51||34.57||33.04|31.68||0.8056||4.03||3.41|
|52||33.28||31.75|30.39||0.7801||3.9||3.28|
|53||32.05||30.52|29.16||0.7556||3.78||3.16|
|54||30.86||29.34|27.99||0.7321||3.66||3.04|
|55||29.73||28.21|26.87||0.7094||3.54||2.93|
|56||28.65||27.13|25.81||0.6875||3.43||2.82|
|57||27.61||26.1|24.78||0.6665||3.33||2.72|
|58||26.61||25.11|23.81||0.6462||3.22||2.62|
|59||25.65||24.17|22.87||0.6266||3.12||2.52|
|60||24.74||23.26|21.98||0.6078||3.03||2.43|
|61||23.86||22.39|21.13||0.5896||2.94||2.35|
|62||23.01||21.56|20.31||0.5721||2.85||2.26|
|63||22.2||20.76|19.53||0.5553||2.76||2.18|
|64||21.43||20|18.78||0.539||2.68||2.11|
|65||20.68||19.27|18.06||0.5233||2.6||2.03|
|66||19.96||18.57|17.38||0.5081||2.52||1.96|
|67||19.28||17.9|16.72||0.4935||2.45||1.89|
|68||18.61||17.25|16.1||0.4794||2.38||1.83|
|69||17.98||16.63|15.49||0.4658||2.31||1.77|
|70||17.37||16.04|14.92||0.4526||2.24||1.71|
|71||16.78||15.47|14.36||0.4399||2.18||1.65|
|72||16.22||14.92|13.84||0.4277||2.12||1.59|
|73||15.68||14.4|13.33||0.4158||2.06||1.54|
|74||15.16||13.89|12.84||0.4044||2||1.49|
|75||14.65||13.41|12.37||0.3933||1.94||1.44|
|76||14.17||12.94|11.93||0.3826||1.89||1.39|
|77||13.71||12.5|11.5||0.3722||1.84||1.35|



8 

www.eaton.com/electronics 

Technical Data ELX1225 Effective July 2022 

NRG Epoxy sealed radial lead NTC thermistor 

## **Temperature characteristics, cont.** 

|**Part number**||**NRG105**||**NRG105**|**NRG105**||**NRG203**||**NRG104**||**NRG104**|
|---|---|---|---|---|---|---|---|---|---|---|---|
|||**4000**||**4190**|**4360**||**3380**||**3380**||**4000**|
|**B type**||**B25/85**||**B25/85**|**B25/85**||**B25/50**||**B25/50**||**B25/50**|
|**Temperature**||**Resistance**||**Resistance**|**Resistance**||**Resistance**||**Resistance**||**Resistance**|
|**(°C)**||**(kΩ)**||**(kΩ)**|**(kΩ)**||**(kΩ)**||**(kΩ)**||**(kΩ)**|
|78||13.26||12.07|11.09||0.3622||1.79||1.3|
|79||12.83||11.66|10.69||0.3526||1.74||1.26|
|80||12.42||11.26|10.31||0.3432||1.69||1.22|
|81||12.02||10.88|9.95||0.3342||1.64||1.18|
|82||11.63||10.51|9.6||0.3254||1.6||1.14|
|83||11.26||10.16|9.26||0.3169||1.56||1.11|
|84||10.91||9.82|8.94||0.3087||1.51||1.07|
|85||10.57||9.5|8.63||0.3008||1.47||1.04|
|86||10.23||9.18|8.33||0.2931||1.44||1.01|
|87||9.92||8.88|8.05||0.2856||1.4||0.9746|
|88||9.61||8.59|7.77||0.2784||1.36||0.9445|
|89||9.31||8.31|7.51||0.2714||1.33||0.9156|
|90||9.03||8.04|7.25||0.2646||1.29||0.8877|
|91||8.75||7.78|7.01||0.2581||1.26||0.8608|
|92||8.48||7.53|6.78||0.2517||1.23||0.8349|
|93||8.23||7.29|6.55||0.2455||1.19||0.8098|
|94||7.98||7.06|6.33||0.2396||1.16||0.7857|
|95||7.74||6.84|6.12||0.2338||1.14||0.7624|
|96||7.51||6.62|5.92||0.2281||1.11||0.7399|
|97||7.29||6.42|5.73||0.2227||1.08||0.7182|
|98||7.07||6.22|5.54||0.2174||1.05||0.6972|
|99||6.87||6.02|5.36||0.2123||1.03||0.677|
|100||6.67||5.84|5.19||0.2073||1||0.6575|
|101||6.47||5.66|5.02||0.2024||0.977||0.6386|
|102||6.29||5.48|4.86||0.1977||0.9533||0.6204|
|103||6.1||5.32|4.71||0.1932||0.9303||0.6027|
|104||5.93||5.16|4.56||0.1887||0.9079||0.5857|
|105||5.76||5|4.42||0.1844||0.8863||0.5693|



9 

www.eaton.com/electronics 

NRG Epoxy sealed radial lead NTC thermistor 

Technical Data ELX1225 Effective July 2022 

## **Temperature characteristics** 

|**Part number**|**NRG104**||**NRG224**||**NRG105**||**NRG105**||**NRG225**|
|---|---|---|---|---|---|---|---|---|---|
||**3950**||**3700**||**3950**||**4120**||**4370**|
|**B type**|**B25/50**||**B25/50**||**B25/50**||**B25/50**||**B25/50**|
|**Temperature**|**Resistance**||**Resistance**||**Resistance**||**Resistance**||**Resistance**|
|**(°C)**|**(kΩ)**||**(kΩ)**||**(kΩ)**||**(kΩ)**||**(kΩ)**|
|-40|325||2056.32||3000||3250||8728.94|
|-39|304.83||1932.46||2819.84||3053.32||8171.87|
|-38|286.01||1816.68||2651.4||2869.42||7652.85|
|-37|268.46||1708.42||2493.87||2697.43||7169.11|
|-36|252.07||1607.15||2346.48||2536.52||6718.12|
|-35|236.77||1512.4||2208.54||2385.94||6297.51|
|-34|222.48||1423.7||2079.41||2244.97||5905.11|
|-33|209.12||1340.65||1958.46||2112.96||5538.92|
|-32|196.64||1262.86||1845.16||1989.31||5197.08|
|-31|184.96||1189.97||1738.98||1873.45||4877.85|
|-30|174.04||1121.66||1639.44||1764.86||4579.66|
|-29|163.83||1057.61||1546.09||1663.05||4301.03|
|-28|154.26||997.53||1458.53||1567.57||4040.59|
|-27|145.31||941.17||1376.36||1478||3797.08|
|-26|136.92||888.28||1299.23||1393.95||3569.34|
|-25|129.06||838.62||1226.81||1315.06||3356.26|
|-24|121.69||791.99||1158.78||1240.99||3156.86|
|-23|114.78||748.18||1094.87||1171.43||2970.19|
|-22|108.3||707.02||1034.8||1106.07||2795.39|
|-21|102.22||668.32||978.32||1044.66||2631.66|
|-20|96.52||631.94||925.21||986.93||2478.25|
|-19|91.16||597.72||875.25||932.66||2334.46|
|-18|86.13||565.53||828.23||881.61||2199.66|
|-17|81.4||535.23||783.97||833.58||2073.24|
|-16|76.96||506.7||742.3||788.39||1954.64|
|-15|72.78||479.84||703.05||745.85||1843.36|
|-14|68.86||454.53||666.07||705.8||1738.91|
|-13|65.16||430.69||631.22||668.08||1640.85|
|-12|61.69||408.22||598.37||632.55||1548.75|
|-11|58.41||387.03||567.39||599.06||1462.23|
|-10|55.33||367.05||538.17||567.5||1380.93|
|-9|52.43||348.19||510.59||537.75||1304.51|
|-8|49.69||330.41||484.57||509.69||1232.66|
|-7|47.12||313.62||460||483.22||1165.09|
|-6|44.69||297.76||436.81||458.24||1101.53|
|-5|42.4||282.79||414.89||434.67||1041.71|
|-4|40.23||268.64||394.19||412.42||985.41|
|-3|38.19||255.28||374.62||391.4||932.4|
|-2|36.27||242.64||356.11||371.56||882.49|
|-1|34.45||230.7||338.62||352.81||835.46|
|0|32.73||219.4||322.07||335.09||791.15|
|1|31.11||208.71||306.41||318.34||749.39|
|2|29.58||198.59||291.59||302.5||710.02|
|3|28.13||189.02||277.56||287.53||672.9|
|4|26.76||179.96||264.28||273.36||637.88|
|5|25.46||171.37||251.69||259.96||604.84|
|6|24.23||163.24||239.77||247.27||573.66|
|7|23.07||155.53||228.48||235.26||544.22|
|8|21.98||148.23||217.77||223.89||516.43|
|9|20.93||141.31||207.61||213.12||490.18|
|10|19.95||134.74||197.98||202.92||465.38|
|11|19.02||128.51||188.84||193.25||441.95|
|12|18.13||122.6||180.18||184.08||419.81|
|13|17.29||117||171.95||175.4||398.87|
|14|16.5||111.67||164.13||167.16||379.07|
|15|15.74||106.62||156.72||159.35||360.34|
|16|15.02||101.82||149.67||151.94||342.62|
|17|14.34||97.26||142.97||144.9||325.85|
|18|13.7||92.93||136.61||138.23||309.98|



10 

www.eaton.com/electronics 

Technical Data ELX1225 Effective July 2022 

NRG Epoxy sealed radial lead NTC thermistor 

## **Temperature characteristics, cont.** 

|**Part number**|**NRG104**||**NRG224**||**NRG105**||**NRG105**||**NRG225**|
|---|---|---|---|---|---|---|---|---|---|
||**3950**||**3700**||**3950**||**4120**||**4370**|
|**B type**|**B25/50**||**B25/50**||**B25/50**||**B25/50**||**B25/50**|
|**Temperature**|**Resistance**||**Resistance**||**Resistance**||**Resistance**||**Resistance**|
|**(°C)**|**(kΩ)**||**(kΩ)**||**(kΩ)**||**(kΩ)**||**(kΩ)**|
|19|13.09||88.81||130.56||131.89||294.95|
|20|12.5||84.89||124.81||125.87||280.72|
|21|11.95||81.17||119.35||120.16||267.24|
|22|11.43||77.63||114.14||114.73||254.46|
|23|10.93||74.26||109.19||109.57||242.36|
|24|10.45||71.05||104.48||104.66||230.88|
|25|10||68||100||100||220|
|26|9.57||65.09||95.73||95.57||209.68|
|27|9.16||62.33||91.66||91.35||199.89|
|28|8.77||59.69||87.79||87.34||190.6|
|29|8.4||57.18||84.1||83.52||181.79|
|30|8.05||54.79||80.58||79.89||173.42|
|31|7.71||52.51||77.23||76.44||165.48|
|32|7.39||50.33||74.03||73.14||157.93|
|33|7.09||48.26||70.98||70.01||150.77|
|34|6.8||46.28||68.08||67.02||143.96|
|35|6.52||44.4||65.3||64.18||137.49|
|36|6.25||42.6||62.65||61.47||131.34|
|37|6||40.88||60.13||58.88||125.49|
|38|5.76||39.24||57.71||56.42||119.93|
|39|5.53||37.67||55.41||54.07||114.64|
|40|5.31||36.17||53.21||51.83||109.61|
|41|5.1||34.74||51.1||49.69||104.82|
|42|4.9||33.38||49.09||47.65||100.26|
|43|4.71||32.07||47.17||45.71||95.92|
|44|4.53||30.82||45.34||43.85||91.79|
|45|4.35||29.63||43.58||42.08||87.85|
|46|4.19||28.49||41.9||40.38||84.1|
|47|4.03||27.4||40.3||38.77||80.53|
|48|3.87||26.35||38.76||37.22||77.13|
|49|3.73||25.36||37.29||35.74||73.88|
|50|3.59||24.4||35.88||34.33||70.79|
|51|3.45||23.48||34.53||32.98||67.84|
|52|3.33||22.61||33.24||31.69||65.03|
|53|3.2||21.77||32.01||30.46||62.34|
|54|3.09||20.96||30.82||29.28||59.78|
|55|2.97||20.19||29.69||28.15||57.33|
|56|2.87||19.45||28.6||27.07||55|
|57|2.76||18.75||27.56||26.04||52.77|
|58|2.66||18.07||26.56||25.05||50.65|
|59|2.57||17.42||25.6||24.1||48.61|
|60|2.48||16.79||24.68||23.2||46.67|
|61|2.39||16.19||23.8||22.33||44.82|
|62|2.31||15.62||22.96||21.5||43.04|
|63|2.23||15.07||22.15||20.7||41.35|
|64|2.15||14.54||21.37||19.94||39.73|
|65|2.08||14.03||20.62||19.21||38.18|
|66|2||13.54||19.9||18.5||36.7|
|67|1.94||13.08||19.21||17.83||35.28|
|68|1.87||12.63||18.55||17.19||33.92|
|69|1.81||12.19||17.91||16.57||32.62|
|70|1.75||11.78||17.3||15.97||31.38|
|71|1.69||11.38||16.71||15.4||30.19|
|72|1.63||11||16.15||14.86||29.05|
|73|1.58||10.63||15.61||14.33||27.96|
|74|1.53||10.27||15.09||13.83||26.91|
|75|1.48||9.93||14.58||13.34||25.91|
|76|1.43||9.6||14.1||12.88||24.95|
|77|1.38||9.29||13.64||12.43||24.03|



www.eaton.com/electronics 11 

NRG Epoxy sealed radial lead NTC thermistor 

Technical Data ELX1225 Effective July 2022 

## **Temperature characteristics, cont.** 

|**Part number**|**NRG104**||**NRG224**||**NRG105**||**NRG105**||**NRG225**|
|---|---|---|---|---|---|---|---|---|---|
||**3950**||**3700**||**3950**||**4120**||**4370**|
|**B type**|**B25/50**||**B25/50**||**B25/50**||**B25/50**||**B25/50**|
|**Temperature**|**Resistance**||**Resistance**||**Resistance**||**Resistance**||**Resistance**|
|**(°C)**|**(kΩ)**||**(kΩ)**||**(kΩ)**||**(kΩ)**||**(kΩ)**|
|78|1.34||8.98||13.19||12||23.15|
|79|1.3||8.69||12.76||11.59||22.31|
|80|1.26||8.41||12.34||11.2||21.5|
|81|1.22||8.14||11.95||10.82||20.72|
|82|1.18||7.88||11.56||10.45||19.97|
|83|1.14||7.63||11.19||10.1||19.26|
|84|1.11||7.39||10.84||9.76||18.57|
|85|1.07||7.15||10.49||9.43||17.91|
|86|1.04||6.93||10.16||9.12||17.28|
|87|1.01||6.71||9.84||8.82||16.67|
|88|0.9762||6.5||9.54||8.53||16.09|
|89|0.9467||6.3||9.24||8.25||15.53|
|90|0.9183||6.11||8.95||7.98||14.99|
|91|0.8909||5.92||8.68||7.72||14.47|
|92|0.8644||5.74||8.41||7.48||13.97|
|93|0.8389||5.57||8.16||7.24||13.49|
|94|0.8143||5.4||7.91||7||13.04|
|95|0.7905||5.24||7.67||6.78||12.59|
|96|0.7675||5.08||7.44||6.57||12.17|
|97|0.7454||4.93||7.22||6.36||11.76|
|98|0.724||4.78||7||6.16||11.37|
|99|0.7033||4.64||6.8||5.97||10.99|
|100|0.6833||4.51||6.6||5.78||10.63|
|101|0.6639||4.37||6.4||5.61||10.28|
|102|0.6453||4.25||6.22||5.43||9.94|
|103|0.6272||4.13||6.04||5.27||9.61|
|104|0.6098||4.01||5.86||5.11||9.3|
|105|0.5929||3.89||5.69||4.95||9|



## **Manual solder** 

+360 °C, 2.5 seconds maximum by soldering iron, distance between soldering position and coating 10 mm minimum. 

Life Support Policy: Eaton does not authorize the use of any of its products for use in life support devices or systems without the express written approval of an officer of the Company. Life support systems are devices which support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 

Eaton reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Eaton also reserves the right to change or update, without notice, any technical information contained in this bulletin. 

## **Eaton** 

**Electronics Division** 1000 Eaton Boulevard Cleveland, OH 44122 United States Eaton.com/electronics © 2022 Eaton All Rights Reserved Printed in USA Publication No. ELX1225 BU-ELX22085 July 2022 

Eaton is a registered trademark. All other trademarks are property of their respective owners. 

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## Links

- [View this product on Novapart](https://novapart.co/products/NRG1684H3950B1H/ntc-thermistor-68-kohm-3950-k-free-hanging-wire)
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---

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