Power

Recovery rectifiers meet requirements of SMPS applications

24th January 2018
Lanna Cooper

The dual high power SDUR60P60WT series of ultrafast rectifiers in a three-leaded TO-247AD (Pb-Free) package, is now being provided by SMC Diode Solutions. The robust parts are supplied in the common cathode configuration and notably feature a continuous forward current rating of 60A, a reverse voltage rating of 600V, and very low reverse leakage current losses.

Their high reverse voltage, high forward current rating and ultrafast switching capabilities make them specifically well suited for demanding SMPS (Switch Mode Power Supplies), DC/DC converter, and PFC (Power Factor Correction). 

A suitable output rectifier, the part is frequently employed as a free-wheeling or boost diode in high frequency power switching applications including converters and motor control circuits, and is equally appropriate in a wide range of applications requiring an anti-parallel diode for high frequency switching devices, such as IGBT (Insulated Gate Bipolar Transistors).

The series is commonly specified as an anti-saturation diode, or snubber diode. It may also be used in UPS (Uninterruptable Power Supplies), inductive heating and melting, ultrasonic cleaners and welders, and as an alternative energy inverter.

The company's 60A, 600V ultrafast recovery rectifier delivers a low forward voltage drop (VF) of 1.2V typical (IF =15A, 25°C) to reduce heat dissipation and maximise energy efficiency, as well as a low idle current of 30nA typical (600V, 25°C) to further enhance energy efficiency.

It additionally features a high forward surge rating of 200A, essential in reactively loaded circuits. Typical reverse recovery time (trr) is 40ns.

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