This part is a kind of semiconductor called MDF12N50TH.

Function of this product has N-Channel MOSFET 500V.

Manufacturers : MagnaChip

Image and pinout :

Some of the text within the PDF file :

MDF12N50 N-channel MOSFET 500V MDF12N50 N-Channel MOSFET 500V, 11.5 A, 0.65Ω General Description The MDF12N50 uses advanced MagnaChip’s MOSFET Technology, which provides low on-state resistance, high switching performance and excellent quality. MDF12N50 is suitable device for SMPS, high Speed switching and general purpose applications. Features VDS = 500V ID = 11.5A RDS(ON) ≤ 0.65Ω @ VGS = 10V @ VGS = 10V Applications Power Supply PFC High Current, High Speed Switching D G DS Absolute Maximum Ratings (Ta = 25oC) Drain-Source Voltage Gate-Source Voltage Characteristics Continuous Drain Current (※) Pulsed Drain Current(1) Power Dissipation Peak Diode Recovery dv/dt(3) Single Pulse Avalanche Energy(4) Junction and Storage Temperature Range ※ Id limited by maximum jun [ ... ]

MDF12N50TH PDF Datasheet Download