This part is a kind of semiconductor called 2SA1020.

Function of this product has PNP EPITAXIAL SILICON TRANSISTOR.

Manufacturers : Unisonic Technologies

Image and pinout :

Some of the text within the PDF file :

UTC 2SA1020 PNP EPITAXIAL SILICON TRANSISTOR SILICON PNP EPITAXIAL TRANSISTOR DESCRIPTION The UTC 2SA1020 is designed for power amplifier and power switching applications. 1 FEATURES *Low collector saturation voltage: VCE(sat)=-0.5V(max.) (IC=-1A) *High speed switching time: tstg=1.0µs(Typ.) *Complement to UTC 2SC2655 SOT-89 1:EMITTER 2:COLLECTOR 3:BASE ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL VALUE -50 -50 -5 -2 0.5 1 150 -55 ~ +150 UNIT V V V A W W °C °C Collector-Base Voltage VCBO Collector-Emitter Voltage VCEO Emitter-Base Voltage VEBO Collector Current Ic Collector Power Dissipation PC Collector Power Dissipation PC* Junction Temperature Tj Storage Temperature TSTG * : Mounted on cermic substrate( 250mm2 × 0.8t ) ELECTRICAL CHARACTERISTICS (Ta=25°C, unless [ ... ]

2SA1020 PDF Datasheet Download