This part is a kind of semiconductor called IRFZ44N.

Function of this product has N-CHANNEL Power MOSFET.

Manufacturers : Matsu

Image and pinout :

Some of the text within the PDF file :

APPLICATION ‹ Buck Converter High Side Switch ‹DC motor control , Ups ...etc , & other Application VDSS 55V RDS(ON) Max. 17.5mȍ PIN CONFIGURATION TO-220 Front View ID 50A IRFZ44N N-CHANNEL Power MOSFET FEATURES ‹Ultra Low ON Resistance ‹Low Gate Charge ‹ Dynamic dv/dt Rating ‹ Inductive Switching Curves ‹ Peak Current vs Pulse Width Curve SYMBOL D GATE DRAIN SOURCE G S 12 3 ʳ ABSOLUTE MAXIMUM RATINGS N-Channel MOSFET Rating Drain to Source Voltage Drain to Current Ё Continuous Tc = 25к, VGS@10V Ё Continuous Tc = 100к, VGS@10V Ё Pulsed Tc = 25к, VGS@10V (Note 1) Gate-to-Source Voltage Ё Continue Total Power Dissipation Derating Factor above 25к Peak Diode Recovery dv/dt (Note 3) Operating Junction and Storage Temperature Range Repetitive Avalanche Energy (No [ ... ]

IRFZ44N PDF Datasheet Download