This part is a kind of semiconductor called P16NS25.

Function of this product has STP16NS25.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

N-CHANNEL 250V - 0.23Ω - 16A TO-220 / TO-220FP MESH OVERLAY™ MOSFET TYPE STP16NS25 STP16NS25FP s s s STP16NS25 STP16NS25FP VDSS 250 V 250 V RDS(on) < 0.28 Ω < 0.28 Ω ID 16 A 16 A TYPICAL RDS(on) = 0.23 Ω EXTREMELY HIGH dv/dt CAPABILITY 100% AVALANCHE TESTED 1 3 2 1 3 2 TO-220 DESCRIPTION Using the latest high voltage MESH OVERLAY ™ process, STMicroelectronics has designed an advanced family of power MOSFETs with outstanding performance. The new patented STrip layout coupled with the Company’s proprietary edge termination structure, makes it suitable in coverters for lighting applications. TO-220FP INTERNAL SCHEMATIC DIAGRAM APPLICATIONS s HIGH CURRENT, HIGH SPEED SWITCHING s SWITH MODE POWER SUPPLIES (SMPS) s DC-DC CONVERTERS FOR TELECOM, INDUS [ ... ]

P16NS25 PDF Datasheet Download