Vishay unveils 28 600V and 650V FRED Pt Gen 4 Ultrafast recovery diodes designed for high-frequency converters used in applications such as power modules, motor drives, UPS, solar inverters and welding machine inverters.

Available as die in wafer form, the "H" and "U" series devices offer ultra-low forward voltage and reverse recovery charge to reduce losses and increase efficiency while their soft turn-off behaviour minimises over-voltages under all switching conditions.

The devices released are designed for use as anti-parallel diodes in combination with Vishay's new Trench insulated gate bipolar transistors (IGBTs). Together, the Ultrafast diodes and IGBTs provide low EMI and plug-and-play reliability for single- and three-phase inverters, as well as full- and half-bridge DC/DC converters. The "H" and "U" series devices can also be used as stand-alone components for power factor correction (PFC) circuits, boosters, choppers and secondary-side rectification.

Designed to minimise conduction losses in medium-speed circuits, 600V "U" series diodes feature extremely low forward voltage down to 1.4V for 600V devices and 1.48V for 650V devices. Optimised to deliver high speeds for higher-frequency applications, "H" series diodes offer reverse recovery times down to 25ns with low typical forward voltages down to 1.65V for 600V devices and 1.74V for 650V devices.

The Gen 4 diodes feature improved technologies in their active area and termination design—allowing for forward currents ranging from 12A to 250A in smaller die sizes than previous-generation devices—while their reduced thickness improves thermal impedance. For high reliability, the polyimide passivated diodes offer a high operating temperature to 175°C.

Samples and production quantities of the Gen 4 Ultrasoft recovery diodes are available now, with lead times of eight weeks for large orders.

By: DocMemory
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