This part is a kind of semiconductor called 20NK50Z.

Function of this product has STFI20NK50Z.

Manufacturers : STMicroelectronics

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Some of the text within the PDF file :

STFI20NK50Z N-channel 500 V, 0.23 Ω , 17 A Zener-protected SuperMESH™ Power MOSFET in I²PAKFP package Datasheet production data Features Type STFI20NK50Z VDSS 500 V RDS(on) max < 0.27 Ω ID 17 A PTOT 40 W ■ Fully insulated and low profile package with increased creepage path from pin to heatsink plate Extremely high dv/dt capability 100% avalanche tested Gate charge minimized 1 2 ■ ■ ■ 3 I2PAKFP (TO-281) Applications ■ Figure 1. Internal schematic diagram D(2) Switching applications Description This device is an N-channel Zener-protected Power MOSFET developed using STMicroelectronics' SuperMESH™ technology, achieved through optimization of ST's wellestablished strip-based PowerMESH™ layout. In addition to a significant reduction in onresistance, this dev [ ... ]

20NK50Z PDF Datasheet Download