View 2n3055 datasheet:

2N3055 SILICON NPN TRANSISTOR n SGS-THOMSON PREFERRED SALESTYPE DESCRIPTION The 2N3055 is a silicon epitaxial-base NPN transistor in Jedec TO-3 metal case. It is intended for power switching circuits, series and shunt regulators, output stages and high fidelity amplifiers. 1 2 TO-3 INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VCBO Collector-Base Voltage (IE = 0) 100 V V Collector-Emitter Voltage (R = 100?)70 V CER BE VCEO Collector-Emitter Voltage (IB = 0) 60 V V Emitter-Base Voltage (I = 0) 7 V EBO C IC Collector Current 15 A IB Base Current 7 A o P Total Dissipation at T ? 25 C 115 W tot c o T Storage Temperature -65 to 200 C stg o T Max. Operating Junction Temperature 200 C j 1/4 October 1995 2N3055 THERMAL DATA o