This part is a kind of semiconductor called W20NM60FD.

Function of this product has STW20NM60FD.

Manufacturers : ST Microelectronics

Image and pinout :

Some of the text within the PDF file :

STP20NM60FD - STF20NM60D STW20NM60FD N-CHANNEL 600V - 0.26Ω - 20A TO-220/TO-220FP/TO-247 FDmesh™ POWER MOSFET (with FAST DIODE) TYPE STP20NM60FD STF20NM60D STW20NM60FD n n n n VDSS 600 V 600 V 600 V RDS(on) < 0.29 Ω < 0.29 Ω < 0.29 Ω ID 20 A 20 A 20 A Pw 192 W 45 W 214 W 3 1 2 n n TYPICAL RDS(on) = 0.26Ω HIGH dv/dt AND AVALANCHE CAPABILITIES 100% AVALANCHE TESTED LOW INPUT CAPACITANCE AND GATE CHARGE LOW GATE INPUT RESISTANCE TIGHT PROCESS CONTROL AND HIGH MANUFACTURING YIELDS TO-220 TO-220FP 3 2 1 TO-247 DESCRIPTION The FDmesh™ associates all advantages of reduced on-resistance and fast switching with an intrinsic fast-recovery body diode. It is therefore strongly recommended for bridge topologies, in particular ZVS phase-shift converters. INTERNAL SCHEMATIC DIAG [ ... ]

W20NM60FD PDF Datasheet Download