This part is a kind of semiconductor called C5027.

Function of this product has KSC5027.

Manufacturers : Fairchild Semiconductor

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Some of the text within the PDF file :

KSC5027 KSC5027 High Voltage and High Reliability • High Speed Switching • Wide SOA 1 TO-220 2.Collector 3.Emitter 1.Base NPN Silicon Transistor Absolute Maximum Ratings TC=25°C unless otherwise noted Symbol VCBO VCEO VEBO IC ICP IB PC TJ TSTG Parameter Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current (DC) Collector Current (Pulse) Base Current Collector Dissipation ( TC=25°C) Junction Temperature Storage Temperature Value 1100 800 7 3 10 1.5 50 150 - 55 ~ 150 Units V V V A A A W °C °C Electrical Characteristics TC=25°C unless otherwise noted Symbol BVCBO BVCEO BVEBO VCEX(sus) ICBO IEBO hFE1 hFE2 VCE(sat) VBE(sat) Cob fT tON tSTG tF Parameter Collector-Base Breakdown Voltage Collector-Emitter Breakdown Voltage Emitt [ ... ]

C5027 PDF Datasheet Download