This part is a kind of semiconductor called KSR1002.

Function of this product has Switching Application.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

KSR1002 KSR1002 Switching Application (Bias Resistor Built In) • Switching circuit, Inverter, Interface circuit, Driver Circuit • Built in bias Resistor (R1=10KΩ, R2=10KΩ) • Complement to KSR2002 1 TO-92 1. Emitter 2. Collector 3. Base Equivalent Circuit C R1 B R2 NPN Epitaxial Silicon Transistor Absolute Maximum Ratings Ta=25°C unless otherwise noted Symbol VCBO VCEO VEBO IC PC TJ TSTG Parameter Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current Collector Power Dissipation Junction Temperature Storage Temperature Value 50 50 10 100 300 150 -55 ~ 150 E Units V V V mA mW °C °C Electrical Characteristics Ta=25°C unless otherwise noted Symbol BVCBO BVCEO ICBO hFE VCE(sat) fT Cob VI(off) VI(on) R1 R1/R2 Parameter Collector-Base Breakdo [ ... ]

KSR1002 PDF Datasheet Download