DKF503N5

NTC THERMISTOR, 50K, DO-35

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Manufacturer: AMPHENOL ADVANCED SENSORS
Product type: Temperature Sensing / Compensation NTC Thermistors
Product Range: DK
Beta Value (K): 3960K
Thermistor Mounting: Through Hole
Thermistor Terminals: Axial Leaded
Thermistor Case Style: DO-35
Operating Temperature Max: 250°C
Operating Temperature Min: -40°C
Zero Power Resistance at 25°C: 50kohm

Delivery and price
Units per pack	25000
Price	0.612 €
Current stock	10+
Lead time	30 days

Datasheet

## NTC Diode 

## Thermometrics 

## Thermistors 

A range of NTC chip thermistors in DO-35 style glass package (diode outline) with axial soldercoated copper-clad steel wires. 

- Designed for accurate temperature measurement,  control and compensation 

- Tight tolerances on resistance and B value 

- Operation up to 482°F (250°C) with excellent stability 

- Glass body provides hermetic seal and voltage insulation and excellent stability 

- Designed for cost effective solid state sensor 

   - Available on axial bandolier to IEC-286-1/ EIA-468A and packet taped to EIA RS-481 for MELF. 

   - Also available loose-packed with axial, radial and SMD wire forms 

   - Suitable for automotive, telecom (battery packs), HVAC and white goods applications 

   - Temperature sensing for household appliances such as rice cookers, electronic ranges, ovens, etc. 

   - Temperature sensing for industrial products such as pharmaceuticals, chemicals, food, etc.components. 

- Lead-wires metallurgically bonded to thermistor element for improved reliability (Type GE only) 

- Resistant to corrosive atmospheres and harsh environments 

## **Amphenol Advanced Sensors** 

## Type DK Specifications 

Chip thermistor in DO-35 glass package 

## **Options** 

- Other resistance values within the ranges shown; e.g. code DKA302*2 for 3000 Ω ±2% at 77°F (25°C) 

- Reference temperatures in the range 0°F to 302°F (-18°C to 150°C) 

- Operation to 572°F (300°C) (no solder coating on wires) 

- Wire lengths 0.16 in to 1.26 in (4 mm to 32 mm) ±0.04 in (±1 mm) for DK-N; up to 1.02 in (26 mm) for DK-H 

## **Coding** 

Replace * in the codes shown below as follows: 

- Axial, loose-packed: N 

- Axial, bandoliered: B 

- Radial, loose-packed: H 

**==> picture [291 x 205] intentionally omitted <==**

**----- Start of picture text -----**<br>
0.08 in (2 mm) 0.02 in (0.5 mm)<br>DK-N maximum nominal<br>1.06 in (27 mm)  0.2 in (4.2 mm)<br>minimum maximum<br>DK-H<br>0.08 in (2  0.16 in (4 mm)<br>mm) maximum 0.1 in (2.8 mm)<br>Inside radius nominal Ø 0.02 in (0.5 mm) nominal<br>0.05 in (1.2<br>mm)<br>nominal<br>0.8 in (19.5 mm) ±1<br>**----- End of picture text -----**<br>


_NTC Type DK wires should not be bent within 0.08 in (2 mm) of glass body_ 

## **Data** 

   - Operating temperature: -40°F to 482°F (-40°C to 250°C) 

   - Thermal time constant: 7 seconds (cooling in air) 

   - Dissipation factor: 3.0 mW/K 

   - Mass: 0.2 g 

   - Packing/MOQ: 1000/box (loose), 5000/reel (bandoliered) 

- Surface mount, loose-packed: M 

**==> picture [313 x 29] intentionally omitted <==**

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R25  Ω Material  B 25/85 K Code   Code   Code  Code<br>system R25 ±2% R25 ±3%  R25 ±5% R25 ±10%<br>**----- End of picture text -----**<br>


|2000|2|3540|±1%|DKA202*2|DKA202*3|DKA202*5|DKA202*10|
|---|---|---|---|---|---|---|---|
|5000|2|3540|±1%|DKA502*2|DKA502*3|DKA502*5|DKA502*10|
|10,000|2|3540|±1%|DKA103*2|DKA103*3|DKA103*5|DKA103*10|
|10,000|5A|3730|±2%||DKC103*3|DKC103*5|DKC103*10|
|12,000|5A|3730|±2%|DKC123*2|DKC123*3|DKC123*5|DKC123*10|
|10,000|3|3960|±1%|DKF103*2|DKF103*3|DKF103*5|DKF103*10|
|20,000|3|3960|±1%|DKF203*2|DKF203*3|DKF203*5|DKF203*10|
|30,000|3|3960|±1%|DKF303*2|DKF303*3|DKF303*5|DKF303*10|
|50,000|3|3960|±1%|DKF503*2|DKF503*3|DKF503*5|DKF503*10|
|100,000|3|3960|±1%|DKF104*2|DKF104*3|DKF104*5|DKF104*10|
|200,000|G|4263|±2%|||DKG204*5|DKG204*10|
|500,000|D|4573|±2%|||DKD504*5|DKD504*10|
|1,000,000|D|4573|±2%|||DKD105*5|DKD105*10|



_See separate tables for resistance-temperature data.. Consult factory for additional tolerance requirements._ 

**2** 

## Type DKM Specifications 

Glass encapsulated SMD thermistor 

## **Description** 

A range of thermistors in DO-35 style glass package (diode outline formed for surface lead-wires and applications) with soldercoated copper-clad steel lead-wires. 

**==> picture [261 x 137] intentionally omitted <==**

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0.09 in (2.2 mm) maximum<br>0.04 in 0.04 in (1 mm) minimum<br>(1 mm) 0.2 in (4.2 mm) maximum<br>minimum<br>0.4 in (9.0 mm)/<br>0.4 in (9.5 mm )<br>**----- End of picture text -----**<br>


_NTC Type DKM wires should not be bent within 0.08 in (2 mm) of glass body_ 

## **Options** 

- Other resistance values within the ranges shown; e.g. code DKA302M2 for 3000 Ω ±2% at 77°F (25°C) 

- Reference temperatures in the range 32°F to 302°F (0°C to 150°C) 

- For tape and reel, add suffix “AB” 

- Operation to 572°F (300°C); no solder coating on lead-wires 

## **Data** 

- Operating temperature: -40°F to 482°F (-40°C to 250°C) 

- Thermal time constant: 7 seconds (cooling in air) 

- Dissipation factor: 3.0 mW/K 

- Mass: 0.2 g 

- Packing/MOQ: 1000/box (loose) 

**==> picture [341 x 30] intentionally omitted <==**

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R25  Ω Material  B 25/85 K Code  Code  Code  Code<br> System R25 ±2% R25 ±3% R25 ±5% R25 ±10%<br>**----- End of picture text -----**<br>


|2000|2|3540|±1%|DKA202M2|DKA202M3|DKA202M5|DKA202M10|
|---|---|---|---|---|---|---|---|
|5000|2|3540|±1%|DKA502M2|DKA502M3|DKA502M5|DKA502M10|
|10,000|2|3540|±1%|DKA103M2|DKA103M3|DKA103M5|DKA103M10|
|10,000|5A|3730|±2%||DKC103M3|DKC103M5|DKC103M10|
|10,000|3|3960|±1%|DKF103M2|DKF103M3|DKF103M5|DKF103M10|
|20,000|3|3960|±1%|DKF203M2|DKF203M3|DKF203M5|DKF203M10|
|30,000|3|3960|±1%|DKF303M2|DKF303M3|DKF303M5|DKF303M10|
|50,000|3|3960|±1%|DKF503M2|DKF503M3|DKF503M5|DKF503M10|
|100,000|3|3960|±1%|DKF104M2|DKF104M3|DKF104M5|DKF104M10|
|200,000|G|4263|±2%|||DKG204M5|DKG204M10|
|500,000|D|4573|±2%|||DKD504M5|DKD504M10|
|1,000,000|D|4573|±2%|||DKD105M5|DKD105M10|



_See separate tables for resistance-temperature data. Consult factory for additional tolerance requirements._ 

**3** 

## Type GE Specifications 

Glass encapsulated DO-35 package 

## **Options** 

- For reel taping 

- Nickel leads for welding 

- Other resistances in the range 250 Ω to 5 M Ω 

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**----- Start of picture text -----**<br>
Tinned AWG 24<br>Ø 0.075 in<br>1.15 in (29.2 mm) 0.155 in 1.15 in (29.2  (1.9 mm)<br>± 0.1 (3.93 mm) mm) maximum<br>maximum ± 0.1<br>NTC Type GE dimensions<br>**----- End of picture text -----**<br>


## **Data** 

   - Standard resistance tolerance: ±10% @ 77°F (25°C) 

- Other tolerances, tolerances at other temperatures 

- Alternative leads lengths, lead materials 

   - Dissipation constant: 3.0 mW/K 

   - Time constant: 7 seconds 

   - Operating range: -58°F to 400°F (-50°C to 204°C 

- Can be expanded to 572°F (300°C) with nickel leads 

- Lead Wires metallurgically bonded to thermistor element for improved reliability 

**==> picture [277 x 25] intentionally omitted <==**

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Beta<br>Ro@25°C ( Ω  )  Material System Type Number<br>25/85<br>**----- End of picture text -----**<br>


|250|GE5.5*|2983|AL03006-165.9-55-G1|
|---|---|---|---|
|500|GE5.5*|2983|AL03006-331.8-55-G1|
|1K|GE7.3|3499|AL03006-624-73-G1|
|2K|GE7.3|3499|AL03006-1248-73-G1|
|2786|GE10.1|4102|AL03006-1576-101-G1|
|3K|GE7.6|3553|AL03006-1847-76-G1|
|4K|GE7.6|3553|AL03006-2463-76-G1|
|5K|GE7.6|3553|AL03006-3079-76-G1|
|10K|GE9.7A|3992|AL03006-5818-97-G1|
|20K|GE9.8|3974|AL03006-11.7K-98-G1|
|30K|GE9.8|3974|AL03006-17.53K-98-G1|
|50K|GE9.7B|3952|AL03006-29.1K-97-G1|
|100K|GE9.7B|3952|AL03006-58.2K-97-G1|
|200K|GE12.3|4365|AL03006-111.3K-123-G1|
|500K|GE13.8|4567|AL03006-269.8K-138-G1|
|1M|GE14.5|4661|AL03006-535K-145-G1|
|5M|GE16.4|4848|AL03006-2.6M-164-G1|



_*maximum operating temperature 302°F (150°C)_ 

**4** 

## Type MELF Specifications 

Glass encapsulated SMD thermistor 

## **Description** 

Hermetically sealed, glass encapsulated thermistor in SOD-80 SMD package. 

## **Options** 

**==> picture [237 x 163] intentionally omitted <==**

**----- Start of picture text -----**<br>
Tinned dumet contacts<br>Ø 0.063 to 0.067 in<br>(2 places)<br>Glass (1.6 to 1.7 mm)<br>0.016 to 0.022 in 0.016 to 0.022 in<br>(0.41 to 0.56 mm) (0.41 to 0.56 mm)<br>0.13 to 0.146 in<br>(3.3 to 3.71 mm)<br>NTC Type MELF dimensions<br>**----- End of picture text -----**<br>


- Pocket Taping 

- Other resistances in the range 250 Ω to 5 M Ω available 

- Other tolerances, tolerances at other temperatures 

## **Data** 

- Standard resistance tolerance: ±10% @ 77°F (25°C) 

- Dissipation constant: 3.0 mW/°C 

- Time constant: 7 seconds 

- Operating range: -58°F to 400°F (-50°C to 204°C) 

**==> picture [290 x 27] intentionally omitted <==**

**----- Start of picture text -----**<br>
Ro@25° C<br>Material System Beta 25/85 Type Number<br>( Ω  )<br>**----- End of picture text -----**<br>


|250|GE5.5*|2983|03006-165.9-55-G100|
|---|---|---|---|
|500|GE5.5*|2983|03006-331.8-55-G100|
|1K|GE7.3|3499|03006-624-73-G100|
|2K|GE7.3|3499|03006-1248-73-G100|
|2786|GE10.1|4102|03006-1576-101-G100|
|3K|GE7.6|3553|03006-1847-76-G100|
|4K|GE7.6|3553|03006-2463-76-G100|
|5K|GE7.6|3553|03006-3079-76-G100|
|10K|GE9.7A|3992|03006-5818-97-G100|
|20K|GE9.8|3974|03006-11.7K-98-G100|
|30K|GE9.8|3974|03006-17.53K-98-G100|
|50K|GE9.7B|3952|03006-29.1K-97-G100|
|100K|GE9.7B|3952|03006-58.2-97-G100|
|200K|GE12.3|4365|03006-111.3K-123-G100|
|500K|GE13.8|4567|03006-269.8K-138-G100|
|1M|GE14.5|4661|03006-535K-145-G100|
|5M|GE16.4|4848|03006-2.6M-164-G100|



_*maximum operating temperature 302°F (150°C)_ 

**5** 

## Type TH Specifications 

Glass encapsulated radial lead thermistor 

**==> picture [239 x 53] intentionally omitted <==**

**----- Start of picture text -----**<br>
Recommended<br>Maximum<br>ß  Maximum<br>Part  Resistance  Permissible<br>Constant  Operating<br>Number (25  Ω  ) Current at<br>(25/50) Current<br>77°F (25ºC)<br>at 77°F (25ºC)<br>**----- End of picture text -----**<br>


|TH220J33G|2.0 K|3375 K|0.22 mA|30.0 mA|
|---|---|---|---|---|
|TH225J13G|2.545 K|3745 K|0.22 mA|30.0 mA|
|TH238J34G|3.896 K|3434 K|0.20 mA|26.5 mA|
|TH253J34G|5.369 K|3434 K|0.16 mA|24.0 mA|
|TH310J34G|10.74 K|3434 K|0.13 mA|20.0 mA|
|TH310J36G|10.0 K|3684 K|0.14 mA|20.0 mA|
|TH310J39G|10.0 K|3933 K|0.14 mA|20.0 mA|
|TH315J39G|15.0 K|3933 K|0.12 mA|17.0 mA|
|TH320J39G|20.0 K|3952 K|0.10 mA|15.0 mA|
|TH349J39G|49.12 K|3952 K|0.06 mA|10.0 mA|
|TH350J39G|50.0 K|3952 K|0.06 mA|10.0 mA|
|TH398J40G|98.63 K|4014 K|0.045 mA|5.0 mA|
|TH410J40G|100.0 K|4014 K|0.045 mA|5.0 mA|
|TH420J34G|200.0 K|3450 K|0.015 mA|3.5 mA|
|TH423J41G|231.4 K|4176 K|0.015 mA|3.5 mA|
|TH510J44G|1,000 K|4491 K|0.007 mA|1.5 mA|
|TH513J44G|1,388 K|4491 K|0.005 mA|1.0 mA|



- The tolerance of resistance is ±5% for standard device 

- The tolerance of B constant is ±2% for standard device The constant is determined by the equation: 

   - B = 3853.9 In (R25/R50) R25 and R50 represent the thermistor resistance at 77°F and 122°F (25°C and 50°C) respectively 

- Others: For non-standard devices, consult Thermometrics 

|**Dissipation**<br>**Factor**<br>**(in still air)**|**Time**<br>**Constant**<br>**(in still air)**|**Operating**<br>**Temperature**<br>**Range**|**Rated Power**<br>**at 77°F (25ºC)**|
|---|---|---|---|
|2.0 (mW/ºC)|25 (seconds)|-40°F to 482°F<br>(-40°C to 250ºC)|25 mW|



**==> picture [281 x 118] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.02 in (26 mm) 0.17 in (4.2 mm) 1.02 in (26 mm) Ø 0.08 in (2 mm)<br>minimum maximum minimum maximum<br>Ø 0.02in (0.5 mm) maximum<br>**----- End of picture text -----**<br>


_NTC Type TH dimensions_ 

**6** 

## Explanation of Part Number 

|TH<br>(1)|410<br>(2)||S<br>(3)|40<br>(4)|40<br>(4)|F<br>(5)|D<br>(6)|SN<br>-<br>(7)|SN<br>-<br>(7)|T5<br>(8)|
|---|---|---|---|---|---|---|---|---|---|---|
|**1**|**2**||**3 / 5**|||**4**|**6**|**7**||**8**|
|Type|Resistance<br>R(25°C)||Resistance /<br>B Value<br>Tolerance||B Value<br>Range||Standard<br>Temperature|Lead Wire Type||Packing<br>& Other<br>Description|
|Diode Type<br>Thermistor|225:25x102<br>= 2.5kΩ<br>310:10x103<br>=10kΩ<br>410:10x104<br>=100kΩ||F : ± 1%<br>G : ± 2%<br>H : ± 3%<br>J : ± 5%<br>K : ± 10%<br>L : ± 15%<br>M : ± 20%<br>:<br>:<br>S : others<br>S : ± 1.5%||33:3300k<br>~3399k<br>40:4000k<br>~4099k<br>42:4200k<br>~4299k||J : -18°C<br>A : 0°C<br>B : 25°C<br>C : 50°C<br>D : 75°C<br>E : 85°C<br>F : 100°C<br>G : 150°C<br>H : 200°C<br>:<br>:<br>S : others|NR : CP wire<br>NI : Ni plated<br>Sn : Sn plated<br>:<br>:<br>:<br>:<br>S : others|T5 : Taping<br>(52mm,<br>Ammo)<br>---------------<br>R3 : Reel<br>(52mm, 3KP)<br>---------------<br>C11 : 11mm<br>(Wire cutting)<br>---------------<br>Other Special<br>Shape or Dim||



**7** 

## **Amphenol Advanced Sensors** 

www.amphenol-sensors.com 

© 2017 Amphenol Corporation. All Rights Reserved. Specifications are subject to change without notice. Other company names and product names used in this document are the registered trademarks or trademarks of their respective owners. 

**AAS-920-320E  -  08/2017**

Updated at February 9, 2023

Amphenol Advanced Sensors is a leading innovator in sensor technologies and measurement solutions, serving the highly regulated and demanding needs of the transportation, medical, and industrial markets. Through its renowned legacy brands—including Thermometrics for temperature sensing, NovaSensor for pressure, and Telaire for air quality—the company delivers a diverse portfolio of critical components designed to provide accurate environmental data for real-time decision-making. The core of this manufacturer's offering focuses heavily on highly reliable circuit protection and transducer components. Engineers will find an extensive selection of temperature sensing and compensation NTC thermistors, alongside a comprehensive range of high-performance pressure sensors and transducers. These precision-engineered devices are essential for ensuring thermal stability, accurate fluid measurement, and reliable operational feedback in complex commercial and industrial applications. Beyond these primary lines, the selection includes vital power management devices such as inrush current limiting (ICL) NTC thermistors and PTC thermistors engineered to safeguard sensitive electronics. The portfolio is further complemented by specialized temperature sensors, light sensors, and dataloggers, providing a robust, integrated suite of measurement and protection solutions for modern hardware design.

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