# Thermistors (NTC / PTC)

- Page: https://www.songtian-ste.com/en/products/thermistors/
- Chinese version: https://www.songtian-ste.com/zh/products/thermistors/

NTC inrush current limiters, NTC thermistors for sensing and compensation, and PTC thermistors.

- **series**: 15
- **part numbers**: 1,557

Product finder: [NTC inrush current limiters](https://www.songtian-ste.com/en/products/finder/?type=ntc-power) [NTC sensing thermistors](https://www.songtian-ste.com/en/products/finder/?type=ntc-sensing)

[**2025 product catalog (PDF)**](https://www.songtian-ste.com/downloads/songtian-product-catalog-2025-en.pdf)

## NTC inrush current limiters

3

1,557 part numbers

| Series | Key ranges | Approvals | Part numbers |
| --- | --- | --- | --- |
| [**NTC-PS** PS Series NTC Inrush Current Limiters](https://www.songtian-ste.com/en/products/ntc-thermistors/power-ps/) | **Resistance R25**: 0.7–400 Ω; **Max. steady-state current (25 °C)**: 0.1–12 A | UL, CQC, VDE | 1,044 |
| [**NTC-PP** PP Series NTC Inrush Current Limiters](https://www.songtian-ste.com/en/products/ntc-thermistors/power-pp/) | **Resistance R25**: 2.5–200 Ω; **Max. steady-state current (25 °C)**: 0.2–5.0 A |   | 508 |
| [**SMD-NTC (Power)** SMD NTC Inrush Current Limiters](https://www.songtian-ste.com/en/products/smd-thermistors/smd-power/) SMD | **R25 range**: 1.5–200 Ω; **Max. steady-state current**: 1.0–5.0 A |   | On request |

## NTC thermistors for temperature sensing and compensation

8

Series overview; part data on request

| Series | Key ranges | Approvals | Part numbers |
| --- | --- | --- | --- |
| [**SMD Sensing NTC** SMD NTC Thermistors for Temperature Measurement](https://www.songtian-ste.com/en/products/smd-thermistors/smd-sensing/) SMD | **R25**: 1 kΩ–1.3 MΩ; **B25/50**: 3,380–4,500 K |   | On request |
| [**MF51 Special** MF51 Special NTC Temperature Sensors for Electronic Thermometers](https://www.songtian-ste.com/en/products/ntc-thermistors/mf51-electronic-thermometer/) | **Resistance**: 0.2–1,000 kΩ; **B25/50 range**: 3,270–4,500 K |   | On request |
| [**MF51** MF51 Series Glass-Encapsulated NTC Thermistors](https://www.songtian-ste.com/en/products/ntc-thermistors/mf51/) | **Operating temperature**: −20 °C to +250 °C; **Thermal time constant, static air**: 2–11 s |   | On request |
| [**MF52** MF52 Series Bead-Type Precision NTC Temperature Sensors](https://www.songtian-ste.com/en/products/ntc-thermistors/mf52/) | **R25**: 10 / 50 / 100 kΩ; **B25/50**: 3,380 K / 3,950 K |   | On request |
| [**MF58** MF58 Series Glass-Encapsulated NTC Thermistors (Diode Type)](https://www.songtian-ste.com/en/products/ntc-thermistors/mf58/) | **R25**: 0.1 kΩ–3.78 MΩ; **Operating temperature**: −55 °C to +250 °C |   | On request |
| [**MF59** MF59 Series Glass-Encapsulated Chip NTC Thermistors](https://www.songtian-ste.com/en/products/ntc-thermistors/mf59/) | **R25**: 0.1–100 kΩ; **Operating temperature**: −55 °C to +220 °C |   | On request |
| [**CWF** CWF Series Precision NTC Temperature Sensors](https://www.songtian-ste.com/en/products/ntc-thermistors/cwf/) | **R25**: 0.1 kΩ–1 MΩ; **B25/50**: 3,100–4,500 K (11 families) |   | On request |
| [**MF11** MF11 Series NTC Thermistors for Temperature Compensation](https://www.songtian-ste.com/en/products/ntc-thermistors/mf11/) | **R25**: 5 Ω–500 kΩ; **B25/50**: 2,600–4,750 K |   | On request |

## PTC thermistors for overcurrent and overload protection

4

Series overview; part data on request

| Series | Key ranges | Approvals | Part numbers |
| --- | --- | --- | --- |
| [**MZ11** MZ11 Series PTC Thermistors for Overload Protection](https://www.songtian-ste.com/en/products/ptc-thermistors/mz11/) | **Rated voltage**: 65–330 VAC; **Resistance**: 1–500 Ω |   | On request |
| [**MZ13** MZ13 Series PTC Thermistors for Overcurrent Protection](https://www.songtian-ste.com/en/products/ptc-thermistors/mz13/) | **Rated voltage**: 260–700 VAC; **Resistance**: 10–1,000 Ω |   | On request |
| [**MZB** MZB Series PTC Thermistors for Overload Protection](https://www.songtian-ste.com/en/products/ptc-thermistors/mzb/) | **Rated voltage**: 65–330 VAC; **Resistance**: 8–500 Ω |   | On request |
| [**SMD-PTC** SMD PTC Thermistors for Overcurrent Protection](https://www.songtian-ste.com/en/products/smd-thermistors/smd-ptc/) SMD | **Rated voltage**: 260–500 VAC; **Resistance**: 10–5,000 Ω |   | On request |

[Request PTC data](https://www.songtian-ste.com/en/contact/?topic=documents&series=PTC)

Approval scope as stated on each certificate.