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TDK Releases Pb-free NTC thermistors

10.2.2025
Reading Time: 2 mins read
A A

TDK Corporation releases 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 ranging from -40 °C to +155 °C with a tolerance of ±1% and ±3%, respectively. At room temperature, their maximum power dissipation is 60 mW. 

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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 L862 sensor element, encapsulated in a black epoxy coating, is a mere 2.6 x 6.5 mm (in diameter and height) in size. It features insulated silver-plated nickel wire (AWG 30, with an outer diameter of 0.25 mm) as its leads. 

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

  • Short response time
  • High measuring accuracy
  • Different tolerances available

Applications

  • Temperature measurement in a wide variety of automotive and industrial applications (e.g., battery packs, power banks, energy storage, drones)

Related

Source: TDK

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