This part is a kind of semiconductor called IRF840.

Function of this product has N - CHANNEL 500V - 0.75ohm - 8A - TO-220 PowerMESH] MOSFET.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

® IRF840 N - CHANNEL 500V - 0.75Ω - 8A - TO-220 PowerMESH™ MOSFET TYPE IRF840 s s s s s V DSS 500 V R DS(on) < 0.85 Ω ID 8 A TYPICAL RDS(on) = 0.75 Ω EXTREMELY HIGH dv/dt CAPABILITY 100% AVALANCHE TESTED VERY LOW INTRINSIC CAPACITANCES GATE CHARGE MINIMIZED 2 3 DESCRIPTION This power MOSFET is designed using the company’s consolidated strip layout-based MESH OVERLAY™ process. This technology matches and improves the performances compared with standard parts from various sources. APPLICATIONS s HIGH CURRENT, HIGH SPEED SWITCHING s SWITH MODE POWER SUPPLIES (SMPS) s DC-AC CONVERTERS FOR WELDING EQUIPMENT AND UNINTERRUPTIBLE POWER SUPPLIES AND MOTOR DRIVER 1 TO-220 INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol V DS V DGR V GS ID ID IDM ( • ) P t ot dv/dt [ ... ]

IRF840 PDF Datasheet Download