This part is a kind of semiconductor called 2N2955.

Function of this product has SILICON PNP TRANSISTOR.

Manufacturers : Unisonic Technologies

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Some of the text within the PDF file :

UTC 2N2955 SILICON PNP TRANSISTORS The UTC 2N2955 is a silicon PNP transistor in TO-3 SILICON PNP TRANSISTOR metal case. It is intended for power switching circuits, series and shunt regulators, output stages and high fidelity amplifiers. TO-3 ABSOLUTE MAXIMUM RATINGS ( Ta=25°C ,unless otherwise specified ) PARAMETERS Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector-Emitter Voltage Collector Current Collector Peak Current(1) Base Current Base Peak Current(1) Total Dissipation at Ta=25°C Storage Temperature Max. Operating Junction Temperature SYMBOL VCBO VCEO VEBO VCEV Ic ICM IB IBM Ptot TSTG Tj VALUE 100 60 7 70 15 15 7 15 115 -65 to 200 200 UNITS V V V V A A A A W °C °C ELECTRICAL CHARACTERISTICS(Ta=25°C, unless otherwise specified) PARAMETER OF [ ... ]

2N2955 PDF Datasheet Download