This part is a kind of semiconductor called A2039.

Function of this product has 2SA2039.

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

Ordering number : EN6912D 2SA2039/2SC5706 Bipolar Transistor (-)50V, (-)5A, Low VCE(sat), (PNP)NPN Single TP/TP-FA Applications • http://onsemi.com DC / DC converter, relay drivers, lamp drivers, motor drivers, flash Features • • Adoption of FBET and MBIT processes Low collector-to-emitter saturation voltage • • Large current capacitance High-speed switching • High allowable power dissipation Specifications ( ): 2SA2039 Absolute Maximum Ratings at Ta=25°C Parameter Collector-to-Base Voltage Collector-to-Emitter Voltage Collector-to-Emitter Voltage Emitter-to-Base Voltage Collector Current Collector Current (Pulse) Symbol VCBO VCES VCEO VEBO IC ICP Conditions Ratings (--50)100 (--50)100 (--)50 (--)6 (--)5 (--)7.5 Unit V V V V A A Continued on next page. Package Dime [ ... ]

A2039 PDF Datasheet Download