View 2sa1790 e datasheet:

Transistor 2SA1790 Silicon PNP epitaxial planer type For high-frequency amplification Unit: mm Complementary to 2SC4626 1.6± 0.15 0.4 0.8± 0.1 0.4 Features High transition frequency fT. SS-Mini type package, allowing downsizing of the equipment 1 and automatic insertion through the tape packing and the maga- 3 zine packing. 2 Absolute Maximum Ratings (Ta=25?C) Parameter Symbol Ratings Unit 0.2± 0.1 Collector to base voltage VCBO –30 V Collector to emitter voltage VCEO –20 V Emitter to base voltage VEBO –5 V 1:Base Collector current IC –30 mA 2:Emitter EIAJ:SC–75 Collector power dissipation PC 125 mW 3:Collector SS–Mini Type Package Junction temperature Tj 125 ?C Marking symbol : E Storage temperature Tstg –55 ~ +125 ?C Electrical Characteristics (Ta=25?C) Para