This part is a kind of semiconductor called UFB120FA40.

Function of this product has Insulated Ultrafast Rectifier Module.

Manufacturers : International Rectifier

Image and pinout :

Some of the text within the PDF file :

Bulletin PD-20488 12/01 UFB120FA40 Insulated Ultrafast Rectifier Module Features • • • • • • • • • • Two Fully Independent Diodes Ceramic Fully Insulated Package (VISOL = 2500V AC) Ultrafast Reverse Recovery Ultrasoft Reverse Recovery Current Shape Low Forward Voltage Optimized for Power Conversion: Welding and Industrial SMPS Applications Industry Standard Outline Plug-in Compatible with other SOT-227 Packages Easy to Assemble Direct Mounting to Heatsink trr = 35ns IF(AV) = 120A @ TC = 65°C VR = 400V Description The UFB120FA40 insulated modules integrate two state-of-the-art International Rectifier's Ultrafast recovery rectifiers in the compact, industry standard SOT-227 package. The planar structure of the diodes, and the platinum doping lifet [ ... ]

UFB120FA40 PDF Datasheet Download