View 2sa1290 datasheet:

Ordering number:ENN1200D PNP/NPN Epitaxial Planar Silicon Transistors 2SA1290/2SC3254 60V/7A High-Speed Switching Applications Applications Package Dimensions · Various inductance lamp drivers for electrical unit:mm equipment. 2010C · Inverters, converters (strobo, flash, fluorescent lamp [2SA1290/2SC3254] lighting circuit). 10.2 4.5 3.6 5.1 · Power amp (high power car stereo, motor controller). 1.3 · High-speed switching (switching regulator, driver). Features · Low saturation voltage. 1.2 · Excellent current dependence of hFE. · Short switching time. 0.8 0.4 1 2 3 1 : Base 2 : Collector ( ) : 2SA1290 3 : Emitter 2.55 2.55 SANYO : TO-220AB Specifications Absolute Maximum Ratings at Ta = 25?C Parameter Symbol Conditions Ratings Unit Collector-to-Bas