This part is a kind of semiconductor called A1281Y.

Function of this product has KSA1281.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

KSA1281 KSA1281 Audio Power Amplifier • Collector Power Dissipation : PC=1W • 3 Watt Output Application 1 TO-92L 1. Emitter 2. Collector 3. Base PNP 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 Ratings -50 -50 -5 -2 1 150 -55 ~ +150 Units V V V A W °C °C Electrical Characteristics Ta=25°C unless otherwise noted Symbol BVCBO BVCEO BVEBO ICBO IEBO hFE1 hFE2 VBE (sat) VCE (sat) Cob fT Parameter Collector-Base Breakdown Voltage Collector-Emitter Breakdown Voltage Emitter-Base Breakdown Voltage Collector Cut-off Current Em [ ... ]

A1281Y PDF Datasheet Download