This part is a kind of semiconductor called 2SA1941.

Function of this product has PNP Epitaxial Silicon Transistor.

Manufacturers : JILIN SINO

Image and pinout :

Some of the text within the PDF file :

PNP Silicon PNP Epitaxial Transistor R 2SA1941 VCEO=-140V (min) 2SC5198 70W RoHS APPLICATIONS Power Amplifier Applications FEATURES High collector voltage VCEO=140V (min) Complementary to 2SC5198 Recommended for 70-W high-fidelity audio frequency amplifier output RoHS product Package TO-247 1. BASE 2. COLLECTOR (HEAT SINK) 3. EMITTER 不ORDER MESSAGE不 Order codes Marking Halogen Free Package 2SA1941-O- W-N-B 2SA1941 NO TO-247 Packaging Tube Weight 6.03g(typ) ABSOLUTE RATINGS (Tc=25℃ unless otherwise noted) Parameter Symbol Value Unit Collector- Base Voltage VCBO -140 V Collector- Emitter Voltage VCEO -140 V Emitter-Base Voltage VEBO -5 V Collector Current IC -15 A Base Current IB -1.5 A Collector Dissipation(Tc=25 ) PC 130 W Junction T [ ... ]

2SA1941 PDF Datasheet Download