The 220 kA breaking capacity at 240 V AC is the headline number that governs fault interruption in high-available-fault-current panels — that rating drops to 154 kA at 415 V and 121 kA at 440 V, then to 17 kA at 500 V and 690 V, so the voltage class of your distribution determines where this breaker can clear a fault without cascading upstream. The 4-pole construction suits three-phase-plus-neutral or three-phase-plus-switched-pole applications where full isolation is required. The TM220 release means thermal protection for overloads and magnetic (instantaneous) for short circuits, factory-set with no trip indicator or undervoltage release on this variant.
At 55 °C it derates to 49 A, at 60 °C to 48 A, at 65 °C to 46 A, and at 70 °C to 45 A. Dimensions are 130 mm height, 101.6 mm width, 70 mm depth — a standard SENTRON 3VA footprint that mounts on DIN rail or directly to a backplate. The 4-pole width is wider than a 3-pole equivalent; verify the panel's gland-plate cutout and busbar spacing before committing the BOM line.