This part is a kind of semiconductor called CK100.

Function of this product has NPN Silicon Planar Transistors.

Manufacturers : Continental Device

Image and pinout :

Some of the text within the PDF file :

Continental Device India Limited An IS/ISO 9002 and IECQ Certified Manufacturer IS/ISO 9002 Lic# QSC/L- 000019.2 NPN SILICON PLANAR TRANSISTORS CL 100, A, B CK 100, A, B TO-39 Metal Can Package CL100 And CK 100 Are Medium Power Transistors Suitable For Awide Range Of Medium Voltage And Current Amplifier Applications. Complementary CK100, A, B ABSOLUTE MAXIMUM RATINGS (Ta=25ºC unless specified otherwise) DESCRIPTION SYMBOL VCER Collector -Emitter Voltage Collector -Base Voltage Emitter Base Voltage Collector Current-Continuous Power Dissipation @ Ta=25ºC Derate above 25ºC Total device dissipation @ Tc=25ºC Derate above 25ºC Operating And Storage Junction Temperature Range VCBO VEBO ICM PD PD Tj, Tstg VALUE 50 60 5 1 800 5.33 3 20 -55 to +175 UNITS V V V A mW mW /°C W mW /°C °C [ ... ]

CK100 PDF Datasheet Download