View 2sc4731 datasheet:

Ordering number:ENN3879A PNP/NPN Epitaxial Planar Silicon Transistors 2SA1827/2SC4731 100V/4A Switching Applications Applications Package Dimensions · Relay drivers, high-speed inverters, converters, and unit:mm other general high-current switching applicaions. 2084B [2SA1827/2SC4731] 4.5 Features 1.9 2.6 10.5 1.2 1.4 · Low collector-to-emitter saturation voltage. · High Gain-Bandwidth Product. · Excellent linearity of DC Current Gain. · Fast switching speed. 1.2 0.5 1.6 0.5 1 2 3 1 : Emitter 2 : Collector Specifications 3 : Base 2.5 2.5 SANYO : FLP ( ) : 2SA1827 Absolute Maximum Ratings at Ta = 25?C Parameter Symbol Conditions Ratings Unit Collector-to-Base Voltage VCBO (–)120 V Collector-to-Emitter Voltage VCEO (–)100 V Emitter-to-Base Voltage VEBO