View 2sa1748 e datasheet:

Transistor 2SA1748 Silicon PNP epitaxial planer type For high-frequency amplification Unit: mm Complementary to 2SC4562 2.1± 0.1 0.425 1.25± 0.1 0.425 Features High transition frequency fT. 1 Small collector output capacitance Cob. 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 –50 V 0.2± 0.1 Collector to emitter voltage VCEO –50 V Emitter to base voltage VEBO –5 V 1:Base Collector current IC –50 mA 2:Emitter EIAJ:SC–70 3:Collector S–Mini Type Package Collector power dissipation PC 150 mW Junction temperature Tj 150 ?C Marking symbol : AL Storage temperature Tstg –55 ~ +150 ?C