Designed for mounting on a heat sink, Vishay Intertechnology, Inc. has released a new AEC-Q200-qualified thick-film power resistor in a low-profile SOT-227 package. The Vishay MCB ISOA offers an optional NTC thermistor for internal temperature monitoring, which simplifies design and saves board space, and pre-applied phase change thermal interface material (PC-TIM) for more efficient mounting and streamlined installation. The power resistor also features high pulse handling capability and high-power dissipation up to 120 W at an 85°C bottom case temperature.
(Source: Vishay Intertechnology)
Key specifications include a resistance range from 0.47 Ω to 1 MΩ, with tolerances of ±5% and ±10%; TCRs of ±100 ppm/K, ±150 ppm/K and ± 300 ppm/K; 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 features a non-inductive design and can include two different resistors, said the company.
Vishay said the 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. Custom testing options are available.
The resistor is built on an exposed alumina substrate instead of a metal tab and is used as a precharge, discharge, active discharge or snubber resistor. Applications include automotive and industrial as well as avionics and military and space (AMS) applications.
Samples and production quantities are available now with lead times of 15 weeks. Pricing for U.S. delivery starts at $10.90 per standard piece (without the optional NTC or PC-TIM) in quantities of 1,000.
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