This part is a kind of semiconductor called MDF5N50FB.

Function of this product has N-Channel Trench MOSFET.

Manufacturers : MagnaChip

Image and pinout :

Some of the text within the PDF file :

MDF5N50FB N-channel MOSFET 500V MDF5N50FB N-Channel MOSFET 500V, 4.5 A, 1.55Ω General Description The MDF5N50FB uses advanced MagnaChip’s MOSFET Technology, which provides low on-state resistance, high switching performance and excellent quality. MDF5N50FB is suitable device for SMPS, high Speed switching and general purpose applications. Features VDS = 500V ID = 4.5A RDS(ON) ≤ 1.55Ω @ VGS = 10V @ VGS = 10V Applications Power Supply PFC Ballast G DS 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 Avalanche Energy(4) Junction and Storage Temperature Range ※ Id limited by maximum junction tem [ ... ]

MDF5N50FB PDF Datasheet Download