It sits in the compact XT1 footprint — the smallest frame in ABB's XT series — sized for distribution panels and motor branch circuits where panel space is tight but the interrupting duty is real.
Listed lifecycle stage is current — meaning ABB still manufactures this order code and it has not been flagged for phase-out. That is the clean read for a BOM freeze: no PCN watch needed yet, no last-time-buy clock running.
What the 3-pole rating means for fit
Three poles means it switches and protects all three phases of a 400 V three-phase supply — the standard for motor feeders, small distribution subfeeds, and panelboard mains in European and IEC-style panels. The XT1H frame accepts plug-in accessories (auxiliary contacts, shunt trips, undervoltage releases) that snap into the same DIN-rail or screw-mount footprint without enlarging the enclosure cutout.