This part is a kind of semiconductor called MDF13N65B.

Function of this product has N-Channel MOSFET.

Manufacturers : MagnaChip

Image and pinout :

Some of the text within the PDF file :

MDF13N65B N-channel MOSFET 650V MDF13N65B N-Channel MOSFET 650V, 14A, 0.46Ω General Description These N-channel MOSFET are produced using advanced MagnaChip’s MOSFET Technology, which provides low onstate resistance, high switching performance and excellent quality. These devices are suitable device for SMPS, high Speed switching and general purpose applications. Features  VDS = 650V  ID = 14A  RDS(ON) ≤ 0.46Ω @ VGS = 10V @ VGS = 10V Applications  Power Supply  PFC  High Current, High Speed Switching D TO-220F MDF Series Absolute Maximum Ratings (Ta = 25oC) Characteristics Drain-Source Voltage Gate-Source Voltage Continuous Drain Current Pulsed Drain Current(1) Power Dissipation Repetitive Avalanche Energy(1) Peak Diode Recovery dv/dt(3) Single Pulse Ava [ ... ]

MDF13N65B PDF Datasheet Download