This part is a kind of semiconductor called 26NM60N.
Function of this product has STL26NM60N.
Manufacturers : STMicroelectronics
Image and pinout :

Some of the text within the PDF file :
STL26NM60N N-channel 600 V, 0.160 Ω , 19 A PowerFLAT™ 8x8 HV ultra low gate charge MDmesh™ II Power MOSFET Features Order code STL26NM60N VDSS @ TJmax 650 V RDS(on) max < 0.185 Ω ID 19 A (1) ' $ 3 3 3 "OTTOMVIEW 1. The value is rated according to Rthj-case ■ ■ ■ 100% avalanche tested Low input capacitance and gate charge Low gate input resistance 0OWER&,!4X(6 Applications ■ Switching applications Figure 1. Internal schematic diagram Description This device is an N-channel MDmesh™ V Power MOSFET based on an innovative proprietary vertical process technology, which is combined with STMicroelectronics’ well-known PowerMESH™ horizontal layout structure. The resulting product has extremely low onresistance, which is unmatched among siliconbased Pow [ ... ]
26NM60N PDF Datasheet Download
