This part is a kind of semiconductor called W15NA50.

Function of this product has STW15NA50.

Manufacturers : ST Microelectronics

Image and pinout :

Some of the text within the PDF file :

www.net STH15NA50/FI STW15NA50 N - CHANNEL ENHANCEMENT MODE FAST POWER MOS TRANSISTOR TYPE STH15NA50 STH15NA50FI STW15NA50 s s s s s s s V DSS 500 V 500 V 500 V R DS( on) < 0.4 Ω < 0.4 Ω < 0.4 Ω ID 14.6 A 9.3 A 14.6 A TO-247 TYPICAL RDS(on) = 0.33 Ω ± 30V GATE TO SOURCE VOLTAGE RATING 100% AVALANCHE TESTED REPETITIVE AVALANCHE DATA AT 100oC LOW INTRINSIC CAPACITANCES GATE GHARGE MINIMIZED REDUCED THRESHOLD VOLTAGE SPREAD TO-218 1 3 2 1 3 3 2 DESCRIPTION This series of POWER MOSFETS represents the most advanced high voltage technology. The optimized cell layout coupled with a new proprietary edge termination concur to give the device low RDS(on) and gate charge, unequalled ruggedness and superior switching performance. APPLICATIONS HIGH CURRENT, HIGH SPEED SWI [ ... ]

W15NA50 PDF Datasheet Download