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Vishay introduces thick film power resistor in compact package SOT-227

Jun 5 2023 2023-06 Passive Components Vishay
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Vishay Intertechnology has announced the availability of a new thick-film power resistor, ISOA, which is AEC-Q200 certified and comes in a SOT-227 compact package for direct heat sink installation. The Vishay MCB ISOA has high pulse processing capability, power dissipation up to 120 W at 85 C base temperature, optional NTC thermistor for internal temperature monitoring, and pre-coated phase change thermal interface material (PC-TIM) to improve mount efficiency.

     Vishay Intertechnology has announced the availability of a new thick-film power resistor, ISOA, which is AEC-Q200 certified and comes in a SOT-227 compact package for direct heat sink installation. The Vishay MCB ISOA has high pulse processing capability, power dissipation up to 120 W at 85 C base temperature, optional NTC thermistor for internal temperature monitoring, and pre-coated phase change thermal interface material (PC-TIM) to improve mount efficiency.

     Using an aluminum substrate instead of sheet metal, the device can be used as a precharge, discharge, active discharge, or buffer resistor, reducing costs for automotive, industrial, avionics, defense, and space (AMS) applications. ISOA has the option of integrating AEC-Q200 certified, temperature-cycled NTC thermistors within the resistance package to simplify design and save board space, while optionally PC-TIM improves manufacturing and mounting efficiency.

     Devices with high power and energy dissipation simplify the design and reduce the required power of the device, thus reducing the cost. The resistor has a high energy pulse processing capability (up to 110 J / 0.1s) and has been tested 3000 times for 230 J / 670 ms and 5000 times for 350 J / 1060 ms multiple pulse cycles, suitable for a variety of applications under high energy and repeated surge pulses. In addition, the device is available for customer custom testing.

     ISOA resistance ranges from 0.47 to 1 MΩ, tolerances are 5% and 10%, and TCRS are ± 100 ppm/K, 150 ppm/K, and ± 300 ppm/K, respectively. Resistance maximum operating voltage 1500 V, operating temperature range -55 C to +150 C, dielectric strength 4000 Vrms. The device is RoHS-compliant and has an induction-free design that can include two different resistors.

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