This part is a kind of semiconductor called 2SC2665.

Function of this product has Silicon NPN Power Transistor.

Manufacturers : Inchange Semiconductor

Image and pinout :

Some of the text within the PDF file :

INCHANGE Semiconductor isc Silicon NPN Power Transistor isc Product Specification 2SC2665 DESCRIPTION ·Collector-Emitter Breakdown Voltage- : V(BR)CEO= 80V(Min) ·Wide Area of Safe Operation APPLICATIONS ·Designed for audio frequency power amplifier applications. ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VALUE UNIT VCBO Collector-Base Voltage 100 V VCEO Collector-Emitter Voltage 80 V VEBO Emitter-Base Voltage 6V IC Collector Current-Continuous PC Collector Power Dissipation @ TC=25℃ TJ Junction Temperature 4A 55 W 150 ℃ Tstg Storage Temperature Range -40~150 ℃ isc Website：www.iscsemi.cn 1 isc & iscsemi is registered trademark INCHANGE Semiconductor isc Silicon NPN Power Transistor isc Product Specification 2SC2665 ELECTRICAL CHARACTERISTICS [ ... ]

2SC2665 PDF Datasheet Download