View 2sc4920 datasheet:

Ordering number:EN4766 NPN Epitaxial Planar Silicon Transistor 2SC4920 Muting Circuit, Driver Applications Features Package Dimensions · High DC current gain. unit:mm · On-chip bias resistance (R1=4.7k? , R2=4.7k? ). 2106A · Very small-sized package permitting 2SC4920- [2SC4920] applied sets to be made smaller and slimmer. 0.75 0.3 0.6 · Small ON resistance. 0 to 0.1 0.2 0.1 0.5 0.5 1.6 1 : Base 2 : Emitter 3 : Collector SANYO : SMCP Specifications Absolute Maximum Ratings at Ta = 25?C Parameter Symbol Conditions Ratings Unit Collector-to-Base Voltage VCBO 25 V Collector-to-Emitter Voltage VCEO 20 V Emitter-to-Base Voltage VEBO 10 V Input Voltage VIN 18 V Collector Current IC 100 mA Collector Current (Pulse) ICP 200 mA Base Current IB 20 mA Collector