This part is a kind of semiconductor called HFS4N65FS.

Function of this product has N-Channel MOSFET.

Manufacturers : SemiHow

Image and pinout :

Some of the text within the PDF file :

HFS4N65FS July 2015 HFS4N65FS 650V N-Channel MOSFET BVDSS = 650 V RDS(on) typ ȍ ID = 4 A FEATURES TO-220F ‰ Originative New Design ‰ Superior Avalanche Rugged Technology ‰ Robust Gate Oxide Technology ‰ Very Low Intrinsic Capacitances ‰ Excellent Switching Characteristics ‰ Unrivalled Gate Charge : 8.5 nC (Typ.) ‰ Extended Safe Operating Area ‰ Lower RDS(ON) : 3.0 ȍ 7S #9GS=10V ‰ 100% Avalanche Tested ‰ Single Gauge Package 12 3 1.Gate 2. Drain 3. Source Absolute Maximum Ratings TC=25୅ unless otherwise specified Symbol Parameter Value VDSS ID IDM VGS EAS IAR EAR PD Drain-Source Voltage Drain Current Drain Current Drain Current – Continuous (TC = 25୅) – Continuous (TC = 100୅) – Pulsed (Note 1) Gate-Source Voltage Single Pulsed Avalanche E [ ... ]

HFS4N65FS PDF Datasheet Download