This part is a kind of semiconductor called 1NK60Z.

Function of this product has STS1NK60Z.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

STS1NK60Z N-CHANNEL 600V - 13Ω - 0.25A - SO-8 Zener-Protected SuperMESH™ Power MOSFET TYPE STS1NK60Z VDSS 600 V RDS(on) < 15 Ω ID 0.25 A Pw 2W TYPICAL RDS(on) = 13Ω EXTREMELY HIGH dv/dt CAPABILITY ESD IMPROVED CAPABILITY 100% AVALANCHE TESTED NEW HIGH VOLTAGE BENCHMARK GATE CHARGE MINIMIZED SO-8 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 very good dv/dt capability for the most demanding applications. Such series complements ST full range of high voltage MOSFETs including revolutionary MDmesh™ products. INTERNAL SCHEMATIC DIAGRAM APPLICATIONS AC ADAPTORS AND BATTERY CHARG [ ... ]

1NK60Z PDF Datasheet Download