What the 3-Pole Rating Means for Fit
The XT1HU3007MFF000XXX: Three poles cover three-phase motor circuits — the standard configuration for a 3-wire delta or wye-fed load. If your application is single-phase or requires a 4-pole disconnect for a three-phase-plus-neutral circuit, this isn't the variant you need. For a standard three-phase motor branch circuit, the 3-pole XT1H 125 fits directly into the DIN-rail footprint of the XT1 family, sharing the same busbar and accessory ecosystem as the rest of the line.