This part is a kind of semiconductor called A1939.

Function of this product has 2SA1939.

Manufacturers : Toshiba Semiconductor

Image and pinout :

Some of the text within the PDF file :

2SA1939 TOSHIBA Transistor Silicon PNP Triple Diffused Type 2SA1939 Power Amplifier Applications Unit: mm • • Complementary to 2SC5196 Recommend for 40-W high-fidelity audio frequency amplifier output stage. Absolute Maximum Ratings (Tc = 25°C) Characteristics Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Base current Collector power dissipation (Tc = 25°C) Junction temperature Storage temperature range Symbol VCBO VCEO VEBO IC IB PC Tj Tstg Rating −80 −80 −5 −6 −0.6 60 150 −55 to 150 Unit V V V A A W °C °C JEDEC JEITA ― ― TOSHIBA 2-16C1A Note: Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in Weight: 4.7 g (typ.) temperature [ ... ]

A1939 PDF Datasheet Download