Thermistors
February 5, 2025
TDK offers Pb-free NTC thermistors for a wide range of automotive and industrial applications
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TDK Corporation (TSE:6762) announces the L862 (B57862L) NTC thermistors with bendable wires and the L871 (B57871L) lead spacing NTC thermistors that can be used in a wide range of automotive and industrial applications. Both series are Pb-free and can measure temperatures between -40 °C and +155 °C with a tolerance of ±1% and ±3% respectively. At room temperature, their maximum power dissipation is 60 mW. Both series are available with different rated resistances between 1 kΩ and 100 kΩ and different R/T characteristics (see tables below and on the next page). After 10,000 h at +70 °C, the deviation of the resistance at room temperature R25 is less than 3%.
The sensor element of the L862 that is encapsulated with a black epoxy coating is just 2.6 x 6.5 mm (D x H) in size and has insulated leads of silver-plated nickel wire (AWG 30, Ø 0.25 mm). The total length of the sensor including the wires is 50 mm, with 6 mm stripped. While the dissipation factor δth of the sensor is 1.4 mW/K, its thermal cooling time constant τc is 14 s.
Also, the sensor element of the L871 is encapsulated with a black epoxy coating. It is just 2.8 x 6.0 mm (D x H) in size and has Cu-clad steel wires (Ø 0.4 mm) with a spacing of 2.5 mm. While the dissipation factor δth of the sensor is 3 mW/K, its thermal cooling time constant τc is 9 s.
Features & Applications
Main applications
- Temperature measurement in a wide variety of automotive and industrial applications (e.g., battery packs, power banks, energy storage, drones)
Main features and benefits
- Short response time
- High measuring accuracy
- Different tolerances available
Key Data
Ordering code | R25 [Ω] | No. of R/T characteristic | B25/100 [K] |
|---|---|---|---|
| B57862L0102+000 | 1 k | 1023 | 3930 ±1% |
| B57862L0202+000 | 2 k | 1038 | 3560 ±1% |
| B57862L0502+000 | 5 k | 8016 | 3988 ±1% |
| B57862L0103+000 | 10 k | 8016 | 3988 ±1% |
| B57862L0104+000 | 100 k | 2014 | 4540 ±1% |
| L862 series (B57862L*) (+ = Resistance tolerance, F = ±1%, H = ±3%) | |||
Ordering code | R25 [Ω] | No. of R/T characteristic | B25/100 [K] |
|---|---|---|---|
| B57871L0202+000 | 2 k | 1038 | 3560 ±1% |
| B57871L0502+000 | 5 k | 8016 | 3988 ±1% |
| B57871L0103+001 | 10 k | 8016 | 3988 ±1% |
| B57871L0303+000 | 30 k | 8018 | 3964 ±1% |
| B57871L0104+000 | 100 k | 2014 | 4540 ±1% |
| L871 series (B57871L*) (+ = Resistance tolerance, F = ±1%, H = ±3%) | |||
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About TDK Corporation
TDK Corporation is a world leader in electronic solutions for the smart society based in Tokyo, Japan. Built on a foundation of material sciences mastery, TDK welcomes societal transformation by resolutely remaining at the forefront of technological evolution and deliberately “Attracting Tomorrow.” It was established in 1935 to commercialize ferrite, a key material in electronic and magnetic products. TDK‘s comprehensive, innovation-driven portfolio features passive components such as ceramic, aluminum electrolytic and film capacitors, as well as magnetics, high-frequency, and piezo and protection devices. The product spectrum also includes sensors and sensor systems such as temperature and pressure, magnetic, and MEMS sensors. In addition, TDK provides power supplies and energy devices, magnetic heads and more. These products are marketed under the product brands TDK, EPCOS, InvenSense, Micronas, Tronics and TDK-Lambda. TDK focuses on demanding markets in automotive, industrial and consumer electronics, and information and communication technology. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America. In fiscal 2024, TDK posted total sales of USD 14.6 billion and employed about 101.000 people worldwide.