STW34NB20 W34NB20 Power MOSFET N-channel 200 V 0.062 Ω 34 A TO-247 STM
This is ORIGINAL MOS POWER made by STMICROELECTRONICS model STW34NB20 ( W34NB20). Beware of imitations or used / tested products! No "used" or " like as new" or "very good condition". --> VERY IMPORTANT <--.