View 2sa1857 datasheet:

Ordering number:EN4644 PNP Epitaxial Planar Silicon Transistor 2SA1857 FM, RF, MIX, IF Amplifier High-Frequency General-Purpose Amplifier Applications Features Package Dimensions · High power gain : PG=25dB typ (f=100MHz). unit:mm · High cutoff frequency : fT=750MHz typ. 2059A · Low collector-to-emitter saturation voltage. [2SA1857] · Complementary pair with the 2SC4400. 1 : Base 2 : Emitter 3 : Collector SANYO : MCP 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 150 mW ?C Junction Temperature Tj 150 Storage Temperature Tstg –55 to +150 ?C Electrical