This part is a kind of semiconductor called P5NB40FP.

Function of this product has STP5NB40FP.

Manufacturers : ST Microelectronics

Image and pinout :

Some of the text within the PDF file :

STP5NB40 STP5NB40FP N - CHANNEL ENHANCEMENT MODE PowerMESH™ MOSFET PRELIMINARY DATA TYPE STP5NB40 STP5NB40FP s s s s s V DSS 400 V 400 V R DS(on) < 1.8 Ω < 1.8 Ω ID 4.7 A 3.1 A TYPICAL RDS(on) = 1.47 Ω 100% AVALANCHE TESTED VERY LOW INTRINSIC CAPACITANCES GATE CHARGE MINIMIZED EXTREMELY HIGH dv/dt CAPABILITY 2 3 2 3 1 1 DESCRIPTION Using the latest high voltage MESH OVERLAY™ TO-220 TO-220FP process, SGS-Thomson has designed an advanced family of Power MOSFETs with outstanding performance. The new patent pending strip layout coupled with the Company’s proprietary edge termination structure, gives the lowest RDS(on) per area, exceptional avalanche INTERNAL SCHEMATIC DIAGRAM and dv/dt capabilities and unrivalled gate charge DataSheet [ ... ]

P5NB40FP PDF Datasheet Download