This part is a kind of semiconductor called H6NA80FI.
Function of this product has STH6NA80FI.
Manufacturers : ST Microelectronics
Image and pinout :

Some of the text within the PDF file :
® STW6NA80 STH6NA80FI N - CHANNEL 800V - 1.8Ω - 5.4A - TO-247/ISOWATT218 FAST POWER MOS TRANSISTOR TYPE V DSS 800 V 800 V R DS(on) < 2.2 Ω < 2.2 Ω ID 5.4 A 3.4 A STW 6NA80 STH6NA80FI s s s s s s s TYPICAL RDS(on) = 1.8 Ω AVALANCE RUGGED TECHNOLOGY 100% AVALANCHE TESTED REPETITIVE AVALANCHE DATA AT 100oC LOW GATE CHARGE VERY HIGH CURRENT CAPABILITY APPLICATION ORIENTED CHARACTERIZATION 3 2 1 3 2 1 TO-247 ISOWATT218 APPLICATIONS s HIGH CURRENT, HIGH SPEED SWITCHING s SOLENOID AND RELAY DRIVERS s REGULATORS s DC-DC & DC-AC CONVERTERS s MOTOR CONTROL, AUDIO AMPLIFIERS s AUTOMOTIVE ENVIRONMENT (INJECTION, ABS, AIR-BAG, LAMPDRIVERS, Etc.) INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value ST W6NA80 V DS V DGR V GS ID ID I DM ( • ) [ ... ]
H6NA80FI PDF Datasheet Download
