RF2-19A-T-00-50-G RF219XDC RF2-1A-DC-2-AL RF2-1A-DC-2-GL RF2-1A-DC-2-RL RF2-1A-DC-2-UL RF21N0R3B101CT RF21N0R4B501 RF21N0R5A251CT RF21N0R6A251CT