Rectifiers reduce conduction and switching losses

17th April 2019
Mick Elliott

Six FRED Pt Gen 5 1200 V Hyperfast and Ultrafast rectifiers have been introduced by Vishay Intertechnology. Offering excellent conduction and switching loss trade-off for devices in their class, the 30A and 60A Vishay rectifiers are designed to increase the efficiency of high frequency converters and of hard- and soft-switched or resonant designs.

Matched to operate with MOSFETs or high speed IGBTs, the devices are optimised for PFC and output rectification stages for EV / HEV battery charging stations, booster stages for solar inverters, and UPS and welding applications.

The rectifiers offer up to 10% lower losses than do competing silicon solutions, cutting the efficiency gap with SiC diodes in half and providing a cost-effective alternative for applications with frequencies in the range of 50kHz.

Both 30A and 60A rectifiers are available in the TO-247L package and in X-type Hyperfast and H-type Ultrafast speed classes.

The 30A devices are also offered in the TO-220AC.

X-type rectifiers offer the advantage of lower QRR, while H-type devices feature lower forward voltage.

Both offer the same forward voltage as competing solutions while delivering up to 40 % lower switching losses and QRR, respectively.

The components offer high temperature operation to +175 °C.

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