This part is a kind of semiconductor called B1228.

Function of this product has 2SB1228.

Manufacturers : Sanyo

Image and pinout :

Some of the text within the PDF file :

Ordering number:EN2214B PNP/NPN Epitaxial Planar Silicon Darlington Transistor 2SB1228/2SD1830 Driver Applications Applications · Suitable for use in control of motor drivers, printer hammer drivers, relay drivers, and constant-voltage regulators. Package Dimensions unit:mm 2041A [2SB1228/2SD1830] Features · High DC current gain. · Large current capacity and wide ASO. · Low saturation voltage. · Micaless package facilitating mounting. ( ) : 2SB1228 1 : Base 2 : Collector 3 : Emitter SANYO : TO-220ML Specifications Absolute Maximum Ratings at Ta = 25˚C Parameter Collector-to-Base Voltage Collector-to-Emitter Voltage Emitter-to-Base Voltage Collector Current Collector Current (Pulse) Collector Dissipation Junction Temperature Storage Temperature Symbol VCBO VCEO VEBO IC ICP PC C [ ... ]

B1228 PDF Datasheet Download