This part is a kind of semiconductor called C2551.

Function of this product has 2SC2551.

Manufacturers : Toshiba

Image and pinout :

Some of the text within the PDF file :

TOSHIBA Transistor Silicon NPN Epitaxial Type (PCT process) 2SC2551 2SC2551 Hight Voltage Control Applications Plasma Display, Nixie Tube Driver Applications Cathode Ray Tube Brightness Control Applications Industrial Applications Unit: mm • High voltage: VCBO = 300 V, VCEO = 300 V • Low saturation voltage: VCE (sat) = 0.5 V (max) • Small collector output capacitance: Cob = 3 pF (typ.) • Complementary to 2SA1091. Absolute Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Base current Collector power dissipation Junction temperature Storage temperature range VCBO VCEO VEBO IC IB PC Tj Tstg 300 300 6 100 20 400 150 −55~150 V V V mA mA mW °C °C JEDEC JEITA TOSHIBA T [ ... ]

C2551 PDF Datasheet Download