Vishay Intertechnology has introduced a new, AEC-Q200-qualified charging resistor that is the industry’s first device to feature hybrid wirewound technology in a standard package size.

With a high operating temperature range up to +250° C, the Vishay MCB HRHA will serve as a pre-charge and discharge resistor in inverters and converters for electric (EV), hybrid electric (HEV), and plug-in hybrid vehicles (PHEV).

Typically, designers must use several thick-film resistors to meet the high pulse requirements of these applications. However, with 10 times the energy absorption in the same size (i.e., 6 kJ for 300 ms), the HRHA allows them to use a single component and lower overall solution costs.

The resistor offers high power ratings up to 90 W on stainless steel and 54 W on Pamitherm. For high accuracy and stability, the resistor features tolerance down to ± 5 %, TCR down to ± 100 ppm/° C, and a resistance range from 1 W to 1 kW.

Easy to mount, the HRHA features a 6.35 mm faston connection. The device can be mounted on a heatsink and is available with an optional integrated fuse. Samples and production quantities of the HRHA series are available now, with lead times of eight to 12 weeks.