View 2sa1739 e datasheet:

Transistor 2SA1739 Silicon PNP epitaxial planer type For high speed switching Unit: mm 2.1± 0.1 0.425 1.25± 0.1 0.425 Features High-speed switch (pair with 2SC3938) 1 Low collector to emitter saturation voltage VCE(sat). S-Mini type package, allowing downsizing of the equipment and 3 automatic insertion through the tape packing and the magazine 2 packing. Absolute Maximum Ratings (Ta=25?C) Parameter Symbol Ratings Unit Collector to base voltage VCBO –15 V 0.2± 0.1 Collector to emitter voltage VCEO –15 V Emitter to base voltage VEBO –4 V Peak collector current ICP –100 mA 1:Base 2:Emitter EIAJ:SC–70 Collector current IC –50 mA 3:Collector S–Mini Type Package Collector power dissipation PC 150 mW Junction temperature Tj 150 ?C Marking symbol : AX Storage temperat