This document describes the application of NTC thermistors for temperature measurement, including the features and characteristics in heating systems and automotive electronics.
This document is a datasheet for the EPCOS B57891 series of leaded NTC thermistors, specifically designed for temperature measurement applications. The components feature a lead spacing of 2.5 mm and are constructed with copper-clad Fe wire leads that are tinned and UL approved (E69802). They are encapsulated in epoxy resin for a rugged design, offering a favorable price-to-performance ratio suitable for heating systems and automotive electronics.
| Lead spacing | 2.5 mm |
|---|---|
| Leads material | copper-clad Fe wire, tinned |
| UL approval | E69802 |
| Climatic category | 55/155/56 |
| Max. power (at 25 °C) | 200 mW |
| Resistance tolerance options | ±1%, ±3%, ±5% |
| Rated temperature | 25 °C |
| Dissipation factor (in air) | approx. 4 mW/K |
| Thermal cooling time constant (in air) | approx. 15 s |
| Heat capacity | approx. 60 mJ/K |
The standard lead spacing is 2.5 mm, though 5 mm is available on request.
The available resistance tolerances are ±1%, ±3%, and ±5%.
The maximum power rating (P25) is 200 mW.
Yes, the leads are UL approved with code E69802.