2SK4221 from onsemi is a MOSFET N-CH 500V 26A TO3PB
2SK3844(Q) from Toshiba Semiconductor and Storage is a MOSFET N-CH 60V 45A TO220NIS
VS-P421 from Vishay General Semiconductor - Diodes Division is a MODULE BRIDGE DBLR 40A 400V D-19
2N4171 from Solid State Inc. is a TO 64 8 AMP SCR
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