Vishay Intertechnology, Inc. today introduced 28 new 600V and 650V FRED Pt® Gen 4 Ultrafast recovery diodes optimized for high-frequency converters in power modules, motor drives, UPS, solar inverters, and welding machine inverters. Offered as die in wafer form, Vishay Semiconductors “H” and “U” series devices offer ultra-low forward voltage and reverse recovery charge to reduce losses and increase efficiency, while their extremely soft turn-off behavior minimizes overvoltages under all switching conditions.
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The devices released today 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 circuits, boosters, choppers, and secondary-side rectification.
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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 degrees C. Samples and production quantities of the Gen 4 Ultrasoft recovery diodes are available now, with lead times of eight weeks for large orders. Pricing for U.S. delivery only is $0.14 per piece.
source: http://www.powerpulse.net/story.php?storyID=32215
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