This part is a kind of semiconductor called IRFZ44N.

Function of this product has N-channel enhancement mode TrenchMOS transistor.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

Philips Semiconductors Product specification N-channel enhancement mode TrenchMOSTM transistor GENERAL DESCRIPTION N-channel enhancement mode standard level field-effect power transistor in a plastic envelope using ’trench’ technology. The device features very low on-state resistance and has integral zener diodes giving ESD protection up to 2kV. It is intended for use in switched mode power supplies and general purpose switching applications. IRFZ44N QUICK REFERENCE DATA SYMBOL VDS ID Ptot Tj RDS(ON) PARAMETER Drain-source voltage Drain current (DC) Total power dissipation Junction temperature Drain-source on-state resistance VGS = 10 V MAX. 55 49 110 175 22 UNIT V A W ˚C mΩ PINNING - TO220AB PIN 1 2 3 tab gate drain source drain DESCRIPTION PIN CONFIGURAT [ ... ]

IRFZ44N PDF Datasheet Download