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Vishay Unveils 120W High Energy Power Resistor

31.5.2023
Reading Time: 3 mins read
A A

Vishay Intertechnology announced availability of its new 120W ISOA high energy thick film power resistor.

Vishay Intertechnology, Inc. introduced a new ISOA AEC-Q200 qualified thick film power resistor in the compact, low profile SOT-227 package that offers high pulse handling capability and high power dissipation up to 120W .

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The 120W ISOA power resistor is offered with optional NTC thermistor for internal temperature monitoring and pre-applied Phase Change Thermal Interface Material (PC-TIM) for more efficient mounting, the Vishay MCB ISOA offers high pulse handling capability and high power dissipation up to 120 W at an 85 °C bottom case temperature.

Built on an exposed alumina substrate instead of a metal tab, the device released today lowers costs for automotive, industrial, and avionics, military, and space (AMS) applications, in which it will serve as a precharge, discharge, active discharge, or snubber resistor. With the option to integrate an AEC-Q200 qualified, temperature cycle tested NTC thermistor inside the resistor package, the ISOA simplifies designs and saves board space, while its optional PC-TIM streamlines installation in production.

The device’s high power and high energy dissipation simplifies designs and lowers costs by reducing the need for power components. For applications subject to high and repetitive pulse surges, the resistor can handle high energy pulses (i.e., 110 J for 0.1 s) and is multi-pulsed tested at 230 J for 670 ms and 3000 cycles and 350 J for 1060 ms and 5000 cycles. Additional custom testing options for the device are also available.

The ISOA features a resistance range from 0.47 Ω to 1 MΩ, with tolerances of ± 5 % and ± 10 %, and TCR of ± 100 ppm/K, ± 150 ppm/K, and ± 300 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 15 weeks.

Features

  • AEC-Q200 qualified
  • Cold system without external radiation
  • High power / volume ratio
  • Cooled by auxiliary heatsink (not supplied)
  • Non-inductive
  • Pre-applied phase change thermal interface PC-TIM
    (optional)
  • Internal temperature monitoring with a NTC thermistor

Applications

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

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Source: Vishay

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