SSM6N48FURF SSM6N55NU SSM6N55NU MOS(场效应管) SSM6N55NU,LF SSM6N55NU,LF(B SSM6N55NU,LF(T SSM6N55NUCF(T SSM6N55NULF 原装 SSM6N55NULF(T SSM6N56FE