This part is a kind of semiconductor called 7MBR150VX120-50.
Function of this product has IGBT MODULE.
Manufacturers : Fuji Electric
Image and pinout :

Some of the text within the PDF file :
http://www.fujielectric.com/products/semiconductor/ 7MBR150VX120-50 IGBT Modules IGBT MODULE (V series) 1200V / 150A / PIM Features Low VCE(sat) Compact Package P.C.Board Mount Module Converter Diode Bridge Dynamic Brake Circuit RoHS compliant product Applications Inverter for Motor Drive AC and DC Servo Drive Amplifier Uninterruptible Power Supply Maximum Ratings and Characteristics Absolute Maximum Ratings (at Tc=25°C unless otherwise specified) Items Symbols Conditions Inverter Collector-Emitter voltage Gate-Emitter voltage Collector current Collector power dissipation Collector-Emitter voltage Gate-Emitter voltage Collector current Collector power dissipation Repetitive peak reverse voltage (Diode) Repetitive peak reverse voltage Average output current Surge current (Non-Re [ ... ]
7MBR150VX120-50 PDF Datasheet Download
