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Vishay Releases Thick Film Power Resistor With Optional NTC Thermistor

23.4.2025
Reading Time: 3 mins read
A A

Vishay Intertechnology, Inc. introduced a new AEC-Q200 automotive qualified thick film power resistor in the compact, low profile SOT-227B package for mounting on a heatsink.

Available with an optional NTC thermistor for internal temperature monitoring and pre-applied Phase Change Thermal Interface Material (PC-TIM) for more efficient mounting, the Vishay MCB ISOA200 offers high pulse handling capability and high power dissipation up to 200 W at an 80 °C bottom case temperature. 

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Built on an exposed alumina substrate instead of a metal tab, the device released today lowers costs and weight for automotive, industrial, and avionics, military, and space (AMS) applications, in which it will serve as a precharge, discharge, active discharge, or snubber resistor.

For applications subject to high and repetitive pulse surges, the resistor can handle high energy pulses up to 140 J for 0.1 s and is multi-pulsed tested. Additional custom testing options for the device are also available. 

With the option to integrate an AEC-Q200 qualified, temperature cycle tested NTC thermistor inside the resistor package, the ISOA200 simplifies designs and saves board space, while its optional PC-TIM streamlines installation in production.

The device’s high power and high energy dissipation further simplify designs while lowering costs by reducing the need for power components. 

The ISOA200 features a resistance range from 10 Ω to 1 MΩ, with tolerances of ± 5 % and ± 10 %, and TCR of ± 100 ppm/K and ± 150 ppm/K. The resistor offers a maximum operating voltage of 1500 V, an operating temperature range of -55 °C to +150 °C, and dielectric strength of 4000 Vrms. The RoHS-compliant device offers a non-inductive design and can include two different resistors. 

Samples and production quantities of the new resistor are available now, with lead times of 12 weeks. 

FEATURES

  • AEC-Q200 qualified
  • Cold system without external radiation
  • High power / volume ratio

APPLICATIONS

  • Automotive: precharge, discharge, and active discharge
  • Industrial and AMS: power conversion and snubber

related articles:

  • RC Snubber Design for SMPS Protection Part I
  • RC Snubber Design for SMPS Protection Part II

Related

Source: Vishay

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