This part is a kind of semiconductor called 20NK50Z.

Function of this product has STP20NK50Z.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

STP20NK50Z - STW20NK50Z STB20NK50Z - STB20NK50Z-S N-CHANNEL 500V -0.23Ω- 17A TO-220/D2PAK/I2SPAK/TO-247 Zener-Protected SuperMESH™ MOSFET TYPE STB20NK50Z STB20NK50Z-S STP20NK50Z STW20NK50Z s s s VDSS 500 500 500 500 V V V V RDS(on) < 0.27 Ω < 0.27 Ω < 0.27 Ω < 0.27 Ω ID 17 17 17 17 A A A A Pw 190 190 190 190 W W W W 1 3 2 1 2 3 s s TYPICAL RDS(on) = 0.23 Ω EXTREMELY HIGH dv/dt CAPABILITY 100% AVALANCHE TESTEDGATE CHARGE MINIMIZED VERY LOW INTRINSIC CAPACITANCES VERY GOOD MANUFACTURING REPEATIBILITY TO-220 TO-247 3 12 3 1 I2SPAK D2PAK DESCRIPTION The SuperMESH™ series is obtained through an extreme optimization of ST’s well established stripbased PowerMESH™ layout. In addition to pushing on-resistance significantly down, special care is taken to ensure a v [ ... ]

20NK50Z PDF Datasheet Download