The ABB UXAB is a rotary handle operating mechanism — the external door-mounted handle that mechanically drives the switching shaft of a panel-mounted switch-disconnector or changeover switch. The MNR LNA32/100 identifies the specific variant, covering a defined shaft interface and handle travel arc. Rated for standard industrial panel integration, the mechanism provides a clear ON/OFF indication and padlockable handle position for lockout/tagout compliance. It is the part that lets an operator safely open or close the main isolator without opening the enclosure door.
What the MNR tells you
The MNR LNA32/100 is the manufacturer's ordering reference that locks the shaft interface, handle colour, and door cut-out dimensions. When replacing a handle on an existing ABB switch-disconnector, verify the installed MNR matches LNA32/100 — the shaft coupling geometry differs between variants, and a mismatched handle will not engage the switch mechanism.