NPN silicon power transistor commonly used in audio amplifiers and general-purpose switching/amplification circuits. Packaged in a TO-220 case.
 
Typical Specifications
Transistor type: NPN
Maximum collector-emitter voltage (Vce): 60 V
Maximum collector current (Ic): 3 A
Maximum power dissipation: 30 W
DC current gain (hFE): 40–320
Package: TO-220 [alltransistors.com], [componentsinfo.com], [el-component.com]
 
Pinout (TO-220, front view)
When looking at the front of the transistor with the leads pointing downward:
Base
Collector
Emitter [alltransistors.com], [componentsinfo.com]
 
Common Uses
Audio power amplifiers
General-purpose amplifiers
Motor and relay drivers
Medium-power switching circuits 
 
Made in China