This part is a kind of semiconductor called ETG81-050.

Function of this product has POWER TRANSISTOR MODULE.

Manufacturers : Fuji

Image and pinout :

Some of the text within the PDF file :

ETG81-050 (30A) FUJI POWER TRANSISTOR MODULE Features Including Free Wheeling Diode High DC Current Gain Insulated Type Applications High Power Switching AC Motor Controls DC Motor Controls Uninterruptible Power Supply Outline Drawings : Maximum ratings and characteristic Absolute maximum ratings (Tc=25°C unless otherwise specified) Item Symbol Rating Unit DC 1ms DC VCBO VCEO VCEO(SUS) VEBO IC ICP -Ic 600 600 450 6 30 60 30 V V V V A A A DC 1ms one Transistor AC.1min IB IBP PC Tj Tstg m Viso Mounting *1 Terminal *2 2 4 200 +150 -40 to +125 100 2000 3.5 1.7 A A W °C °C g V Nm Nm Equivalent Circuit Schematic Item Item Electrical characteristics (Tc =25°C unless otherwise specified) Symbol VCBO VCEO VCEO(SUS) VCEX(SUS) VEBO ICBO IEBO -VCE hFE VCE(Sat) VBE(Sat) ton tst [ ... ]

ETG81-050 PDF Datasheet Download