View 2sa1815 datasheet:

Ordering number:EN4625 PNP Epitaxial Planar Silicon Transistor 2SA1815 FM, RF, MIX, IF Amplifier, High-Frequency General-Purpose Amplifier Applications Features Package Dimensions � High power gain : PG=25dB (f=100MHz). unit:mm � High cutoff frequency ; fT=750MHz typ. 2018A � Low collector-to-emitter saturation voltage. [2SA1815] � Complementary pair with the 2SC4432. C : Collector B : Base E : Emitter SANYO : CP Specifications Absolute Maximum Ratings at Ta = 25?C Parameter Symbol Conditions Ratings Unit Collector-to-Base Voltage VCBO �15 V Collector-to-Emitter Voltage VCEO �12 V Emitter-to-Base Voltage VEBO �3 V Collector Current IC �50 mA Collector Dissipation PC 250 mW Junction Temperature Tj 150 ?C Storage Temperature Tstg �55 to +150 ?C Electrical Chara