Breaking capacity is the real selection gate here: 40 kA Icu at 220/240 V AC, 25 kA at 380/400 V, and 20 kA at 440 V — all per IEC 60947-2. The 25 kA at 400 V covers most European distribution panels; the 40 kA at 240 V suits North American 240/120 V services.
Fixed mounting on a backplate with a 35 mm connection pitch — standard for DIN-rail-compatible busbar systems. The 105 mm width × 161 mm height × 86 mm depth footprint fits a standard MCCB cutout. The neutral position is on the left, and the toggle control is front-accessible for manual switching.
Durability and duty-cycle expectations
Electrical durability is 25,000 cycles at 415 V at half rated current (In/2) per IEC 60947-2, and 8,000 cycles at 400 V at full rated current per GB 14048.2. Mechanical durability is 25,000 cycles per IEC standard. These numbers matter if the breaker is used as a disconnect switch under load — frequent switching will wear the contacts faster than the mechanical count suggests. For infrequent protection-only duty (most distribution panels), these cycles are effectively life-of-installation.