This part is a kind of semiconductor called 2SD1395.
Function of this product has NPN Triple Diffused Planar Silicon Darlington Transistor.
Manufacturers : Sanyo Semicon Device
Image and pinout :

Some of the text within the PDF file :
Ordering number:EN1221C NPN Triple Diffused Planar Silicon Darlington Transistor 2SD1395 Driver Applications Applications · Suitable for use in switching of L load (motor drivers, printer hammer drivers, relay drivers). Package Dimensions unit:mm 2010C Features · High DC current gain. · Large current capacity · Wide ASO. · On-chip Zener diode of 60±10V between collector and base. · Uniformity in collector-to-base breakdown voltage due to adoption of accurate impurity diffusion process. · High inductive load handling capability. Specifications 18.0 5.6 [2SD1395] 10.2 3.6 5.1 4.5 1.3 2.7 6.3 15.1 1.2 0.8 123 2.55 2.55 2.7 14.0 0.4 1 : Base 2 : Collector 3 : Emitter JEDEC : TO-220AB EIAJ : SC-46 Absolute Maximum Ratings at Ta = 25˚C Parameter Collector-to-Base Voltage [ ... ]
2SD1395 PDF Datasheet Download
