This part is a kind of semiconductor called MDF5N50F.

Function of this product has N-Channel MOSFET.

Manufacturers : MagnaChip

Image and pinout :

Some of the text within the PDF file :

MDP5N50F / MDF5N50F N-channel MOSFET 500V MDP5N50F / MDF5N50F N-Channel MOSFET 500V, 4.5 A, 1.55Ω General Description The MDP5N50F/MDF5N50F use advanced Magnachip’s MOSFET Technology, which provides low on-state resistance, high switching performance and excellent quality. MDP5N50F/MDF5N50F are suitable device for SMPS, HID and general purpose applications. Features VDS = 500V ID = 4.5A RDS(ON) ≤ 1.55Ω @VGS = 10V @VGS = 10V Applications Power Supply PFC Ballast D G TO-220 MDP Series TO-220F MDF Series S Absolute Maximum Ratings (Ta = 25oC) Characteristics Drain-Source Voltage Gate-Source Voltage Continuous Drain Current Pulsed Drain Current Power Dissipation Repetitive Avalanche Energy(1) Peak Diode Recovery dv/dt (3) (1) Symbol VDSS VGSS TC=25 C TC=100 C o o MDP5N50F 500 [ ... ]

MDF5N50F PDF Datasheet Download