This part is a kind of semiconductor called KSP44.

Function of this product has High Voltage Transistor.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

KSP44/45 KSP44/45 High Voltage Transistor • Collector-Emitter Voltage: VCEO=KSP44: 400V KSP45: 350V • Collector Power Dissipation: PC (max)=625mW 1 TO-92 NPN Epitaxial Silicon Transistor Absolute Maximum Ratings Ta=25°C unless otherwise noted Symbol VCBO Parameter Collector-Base Voltage : KSP44 : KSP45 VCEO Collector-Emitter Voltage : KSP44 : KSP45 VEBO IC PC PC TJ Emitter-Base Voltage Collector Current Collector Power Dissipation (Ta=25°C) Collector Power Dissipation (TC=25°C) Junction Temperature 1. Emitter 2. Base 3. Collector Value 500 400 400 350 6 300 625 1.5 150 Units V V V V V mA mW W °C TSTG Storage Temperature -55 ~ 150 °C Electrical Characteristics Ta=25°C unless otherwise noted Symbol BVCBO Parameter Collector-Base Breakdown Voltage : KSP44 : KSP45 * Collec [ ... ]

KSP44 PDF Datasheet Download