Charged EVs | TDK offers lead-free NTC thermistors for automotive

Japanese electronics company TDK Electronics has launched its L862 (B57862L) NTC thermistors with bendable wires and the L871 (B57871L) lead spacing NTC thermistors that can be used in automotive and industrial applications.

The thermistors can be used in automotive battery packs as well as power banks, energy storage and drones. They offer short response time and high measuring accuracy.

Both series are lead-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. 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, which 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.

The sensor element of the L871 is also encapsulated with a black epoxy coating. It is just 2.8 x 6.0 mm (D x H) in size and has copper-clad steel wires (Ø 0.4 mm) with a spacing of 2.5 mm. The dissipation factor of the sensor is 3 mW/K, and its thermal cooling time constant is 9 s.

Source: TDK