Thick film power resistor simplifies designs and saves board space

Vishay Intertechnology, Inc. has released a new AEC-Q200-qualified thick film power resistor in the compact, low-profile SOT-227B package for mounting on a heatsink. Obtainable 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 200W at an 80C bottom case temperature.

Built on an exposed alumina substrate instead of a metal tab, the device released today lowers costs and weight for automotive, industrial, and AMS applications. It will perform 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 140J for 0.1s and is multi-pulsed tested. Extra 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 decreasing the necessity for power components.

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