This part is a kind of semiconductor called 2SC4544.

Function of this product has NPN Transistor.

Manufacturers : KOO CHIN

Image and pinout :

Some of the text within the PDF file :

2SC4544 TRANSISTOR (NPN) FEATURES z High voltage: V (BR) CEO = 300 V z Small collector output capacitance: Cob = 3.0 pF (typ.) z Collector metal (fin) is fully covered with mold resin. MAXIMUM RATINGS (TA=25℃ unless otherwise noted) Symbol VCBO VCEO VEBO IC PC TJ Tstg Parameter Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current -Continuous Collector Power Dissipation Junction Temperature Storage Temperature Value 300 300 7 0.1 2 150 -55-150 Units V V V A W ℃ ℃ TO-220 1. BASE 2. COLLECTOR 3. EMITTER 123 ELECTRICAL CHARACTERISTICS (Tamb=25℃ unless otherwise specified) Parameter Symbol Test conditions MIN Collector-base breakdown voltage V(BR)CBO IC=100µA,IE=0 300 Collector-emitter breakdown voltage V(BR)CEO IC=10mA,IB=0 300 Emitt [ ... ]

2SC4544 PDF Datasheet Download