PRECISELY Matched Pair  (2pcs) THF-51S (with measured by curve tracer data) NOS TOKIN V-FET(SIT)  Original, Made in Japan 

THF51S 600V 30A 400W  50n sec

2SK182ES 600V 30A 500W  300n sec

2SK180 600V 20A 300W  250n sec (case:MD-18)

2SK77 200V 20A 200W  (case:MD-18)