At 440 V In, electrical durability is 20,000 cycles at In/2 and 10,000 cycles at full In; mechanical durability is 20,000 cycles. For a distribution breaker that cycles infrequently (once or twice a week under normal operation), that endurance is well into the service life of the panel. The 4-pole (4P) configuration with neutral left means it switches all four poles simultaneously, suitable for a three-phase plus neutral distribution where the neutral must be disconnected for isolation — confirmed by the IEC 60947-2 suitability-for-isolation marking.
The 108 mm width occupies 12 module pitches at 9 mm each — a standard DIN-rail-compatible footprint for a 4P moulded-case breaker. Front connections top and bottom accept Everlink lugs: rigid or stranded aluminium/copper up to 95 mm², flexible copper up to 70 mm². The 35 mm connection pitch with spreaders (27 mm without) matches the typical busbar or cable-lug spacing in a distribution board. IP40 front-face protection keeps out tools and fingers; IK07 impact resistance handles incidental contact during panel wiring.