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Rohm Adds 4th Gen Fast Recovery Diodes


RFL/RFS series improves power supply efficiency and reduces noise measures in air conditioners and EV charging stations

Rohm has developed its 4th Generation 650V fast recovery diodes (FRDs), the RFL/RFS series, featuring low forward voltage (VF), fast reverse recovery time (trr) respectively, as well as ultra-low noise characteristics. The new devices are suitable for industrial and consumer equipment that handle large amounts of power, such as air conditioners and EV charging stations.

Rohm says that optimising the device structure and materials allows the RFL/RFS series to achieve the optimum balance of VF and trr, which are important characteristics for FRDs but are in a trade-off relationship.

The low VF RFL series reduces VF by approx. 3.2 percent and trr by about 8.3 percent over the conventional RFN series, while the high-speed RFS series VF by approx. 17.9 percent vs the conventional RFUH series. Both products contribute to higher power supply efficiency through optimal design based on circuit requirements. Furthermore, ultra-low noise diode recovery characteristics are achieved. They help to reduce both workload and components for noise.

Going forward, Rohm will continue to expand the package lineup of the RFL/RFS series to provide automotive support while expanding applicability by reducing power consumption.

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