AEC-Q200 hybrid wirewound resistor lowers component count, says Vishay
Believed to be the first charging resistor to use hybrid wirewound technology in a standard package size, the Vishay MCB HRHA is designed as a pre-charge and discharge resistor in inverters and converters for electric vehicles (EVs), hybrid EVs (HEVs) and plug-in HEVs (PHEVs).
In pre-charge and discharge applications, the AEC-Q200-qualified charging resistor delivers 10 times higher energy absorption than other component technologies in the same size, said the company.
It has a high operating temperature range up to +250 degrees C. Typically, designers must utilise several thick film resistors to meet the high pulse requirements of these automotive applications. With 10 times the energy absorption in the same size (i.e., 6kJ for 300ms), Vishay Intertechnology said the HRHA allows designers to use a single component and lower overall system costs.
It also offers high power ratings up to 90W on stainless steel and 54W on Pamitherm. For high accuracy and stability, the resistor features tolerance down to ± five per cent, TCR down to ± 100 ppm per degree C and a resistance range from 1.0 Ohm to 1.0kOhm.
Described as easy to mount, the HRHA features a 6.35mm faston connection. The resistor 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.
Vishay claims to manufacture one of the world’s largest portfolios of discrete semiconductors and passive electronic components for the automotive, industrial, computing, consumer, telecommunications, military, aerospace and medical markets.
