This part is a kind of semiconductor called P6NK60ZFP.
Function of this product has STP6NK60ZFP.
Manufacturers : STMicroelectronics
Image and pinout :

Some of the text within the PDF file :
STB6NK60Z - STB6NK60Z-1 STP6NK60ZFP - STP6NK60Z N-channel 600 V - 1 Ω - 6 A - TO-220/TO-220FP/D2PAK/I2PAK Zener-Protected SuperMESH™ Power MOSFET Features Type STB6NK60Z STB6NK60Z-1 STP6NK60ZFP STP6NK60Z ■ ■ ■ VDSS 600 V 600 V 600 V 600 V RDS(on) < 1.2 Ω < 1.2 Ω < 1.2 Ω < 1.2 Ω ID 6A 6A 6A 6A PW 110 W 110 W 30 W 110 W TO-220 1 2 3 3 1 D²PAK Extremely high dv/dt capability 100% avalanche tested Gate charge minimized I²PAK 3 12 3 1 2 TO-220FP Application ■ Switching applications Figure 1. Internal schematic diagram Description The SuperMESH™ series is obtained through an extreme optimization of ST’s well established strip-based PowerMESH™ layout. In addition to pushing on-resistance significantly down, special care is taken to ensure a very good dv/dt [ ... ]
P6NK60ZFP PDF Datasheet Download
