# Thermistor type designation

**URL:** <https://klipper.discourse.group/t/thermistor-type-designation/25792>\
**Category:** General Discussion\
**Created:** [March 24, 2026, 5:15pm UTC](https://klipper.discourse.group/t/thermistor-type-designation/25792 "2026-03-24T17:15:36Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![stolowma](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/stolowma/32/10986_2.png) [@stolowma](https://klipper.discourse.group/u/stolowma)\
**Post date:** [March 24, 2026, 5:15pm UTC](https://klipper.discourse.group/t/thermistor-type-designation/25792/1 "2026-03-24T17:15:36Z")

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### Basic Information:

Printer Model: Two Trees SP5 v3  
 MCU / Printerboard:MKS Robin E3 V3  
 Host / SBC BTT Pad 7 w/ CB1 SBC  
 klippy.log NA

_Fill out above information and_ _ **in all cases attach your** _ **`klippy.log` _file_** (use zip to compress it, if too big). _Pasting your_ `printer.cfg` _is **not** needed_  
_ **Be sure to check our “Knowledge Base” Category first. Most relevant items, e.g. error messages, are covered there** _

### Describe your issue:

… Is there a list of thermistor designations for Klipper? I need to replace the nozzle thermistor and the ones I’m thinking of ordering define themselves a NTC100K 3950. The one now in printer.cfg is Epcos 100K B57560G104F. Are these, and other 100K thermistors equivalent? If not how do I know what syntax to use for defining it?

Thanks

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**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://klipper.discourse.group/u/cardoc)\
**Post date:** [March 24, 2026, 5:32pm UTC](https://klipper.discourse.group/t/thermistor-type-designation/25792/2 "2026-03-24T17:32:16Z")

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Built in thermistor types are clearly defined in the documentation.

> **[Common thermistors - Configuration reference - Klipper documentation](https://www.klipper3d.org/Config_Reference.html?h=temperature+sensors#common-thermistors)**
>
> This document is a reference for options available in the Klipper config file.

You can also use `[thermistor my_thermistor]` to define your own.

> **[\[thermistor\] - Configuration reference - Klipper documentation](https://www.klipper3d.org/Config_Reference.html?h=my_ther#thermistor)**
>
> This document is a reference for options available in the Klipper config file.

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<div class="post-metadata">

**Author:** ![stolowma](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/stolowma/32/10986_2.png) [@stolowma](https://klipper.discourse.group/u/stolowma)\
**Post date:** [March 24, 2026, 5:48pm UTC](https://klipper.discourse.group/t/thermistor-type-designation/25792/3 "2026-03-24T17:48:36Z")

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Thanks, I looked but didn’t find that in the Klipper docs.

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<div class="post-metadata">

**Author:** ![stolowma](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/stolowma/32/10986_2.png) [@stolowma](https://klipper.discourse.group/u/stolowma)\
**Post date:** [March 24, 2026, 6:21pm UTC](https://klipper.discourse.group/t/thermistor-type-designation/25792/4 "2026-03-24T18:21:50Z")

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Generic 3950 looks to be the one I want.

Thanks for the help

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**Author:** ![3dcoded](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/3dcoded/32/20297_2.png) [@3dcoded](https://klipper.discourse.group/u/3dcoded)\
**Post date:** [March 24, 2026, 6:42pm UTC](https://klipper.discourse.group/t/thermistor-type-designation/25792/5 "2026-03-24T18:42:28Z")

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If @cardoc 's answer solved your problem, please mark that post as solved so other people know this is resolved.

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\
**Post date:** [April 24, 2026, 4:43am UTC](https://klipper.discourse.group/t/thermistor-type-designation/25792/6 "2026-04-24T04:43:14Z")

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Closed on April 24, 2026, 4:43am UTC

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