Philips Semiconductors
Silicon Diffused Power Transistor
BU2527DX

Parameters:
Collector-emitter voltage peak value            1500v (Max.)
Collector-emitter voltage (open base)            800v (Max.)
Collector current (DC)                                     12A (Max.)
Collector current peak value                           30A (Max.) 
Total power dissipation                                  45W (Max.)
Collector-emitter saturation voltage                  5V (Max.)
Collector saturation current                            6A (typical)