This part is a kind of semiconductor called 150EBU04.

Function of this product has Ultrafast Soft Recovery Diode.

Manufacturers : Vishay Siliconix

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Some of the text within the PDF file :

150EBU04 Vishay High Power Products Ultrafast Soft Recovery Diode, 150 A FRED PtTM FEATURES • Ultrafast recovery • 175 °C operating junction temperature • Screw mounting only • Lead (Pb)-free plating Cathode Anode RoHS COMPLIANT • Designed and qualified for industrial level BENEFITS PowerTabTM • Reduced RFI and EMI • Higher frequency operation • Reduced snubbing • Reduced parts count PRODUCT SUMMARY trr IF(AV) VR 60 ns 150 A 400 V DESCRIPTION/APPLICATIONS These diodes are optimized to reduce losses and EMI/RFI in high frequency power conditioning systems. The softness of the recovery eliminates the need for a snubber in most applications. These devices are ideally suited for HF welding, power converters and other applications where switching l [ ... ]

150EBU04 PDF Datasheet Download