This part is a kind of semiconductor called C5174.

Function of this product has Silicon NPN Epitaxial Type Transistor.

Manufacturers : Toshiba Semiconductor

Image and pinout :

Some of the text within the PDF file :

TOSHIBA Transistor Silicon NPN Epitaxial Type 2SC5174 Power Amplifier Applications Driver Stage Amplifier Applications 2SC5174 Unit: mm • High transition frequency: fT = 100 MHz (typ.) • Complementary to 2SA1932 Absolute Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit Collector-base voltage VCBO 230 V Collector-emitter voltage VCEO 230 V Emitter-base voltage VEBO 5 V Collector current IC 1 A Base current IB 0.1 A Collector power dissipation Junction temperature Storage temperature range PC 1.8 W Tj 150 °C Tstg −55 to 150 °C JEDEC JEITA ― ― Note: Using continuously under heavy loads (e.g. the application of high TOSHIBA 2-10T1A temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decre [ ... ]

C5174 PDF Datasheet Download