This part is a kind of semiconductor called 12N60H.

Function of this product has N-CHANNEL MOSFET.

Manufacturers : CHONGQING PINGYANG

Image and pinout :

Some of the text within the PDF file :

12N60(F,B,H) 12A mps,600 Volts N-CHANNEL MOSFET FEATURE  12A,600V,RDS(ON)=0.7Ω@VGS=10V/6A  Low gate charge  Low Ciss  Fast switching  100% avalanche tested  Improved dv/dt capability TO-220AB 12N60 ITO-220AB 12N60F TO-263 12N60B TO-262 12N60H Absolute Maximum Ratings(TC=25℃,unless otherwise noted) Parameter Symbol Drain-Source Voltage Gate-Source Voltage Continuous Drain Current Pulsed Drain Current(Note1) Single Pulse Avalanche Energy (Note 2) Avalanche Current(Note1) Repetitive Avalanche Energy (Note1) Reverse Diode dV/dt (Note 3) Operating Junction and Storage Temperature Range Maximum lead temperature for soldering purposes, 1/8"from case for 5 seconds VDSS VGSS ID IDM EAS IAR EAR dv/dt TJ,TSTG TL Mounting Torque 6-32 or M3 screw 12N60 600 ±30 12 48 [ ... ]

12N60H PDF Datasheet Download