This part is a kind of semiconductor called 1815.

Function of this product has Audio Frequency Amplifier & High Frequency OSC.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

KSC1815 KSC1815 Audio Frequency Amplifier & High Frequency OSC • Complement to KSA1015 • Collector-Base Voltage : VCBO= 50V 1 TO-92 1. Emitter 2. Collector 3. Base NPN Epitaxial Silicon Transistor Absolute Maximum Ratings Ta=25°C unless otherwise noted Symbol VCBO VCEO VEBO IC IB PC TJ TSTG Parameter Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current Base Current Collector Power Dissipation Junction Temperature Storage Temperature Value 60 50 5 150 50 400 125 -55 ~ 150 Units V V V mA mA mW °C °C Electrical Characteristics Ta=25°C unless otherwise noted Symbol ICBO IEBO hFE1 hFE2 VCE (sat) VBE (sat) fT Cob NF Parameter Collector Cut-off Current Emitter Cut-off Current DC Current Gain Collector-Emitter Saturation Voltage Base-Emitter Saturat [ ... ]

1815 PDF Datasheet Download