Its 6 kA breaking capacity per EN 60898 (and matching 6 kA per IEC 60947-2) means it can safely interrupt fault currents up to that level on a 230/400 V AC network — adequate for most domestic and light commercial distribution boards where the prospective short-circuit current stays under 6 kA.
The C-curve (tripping characteristic class C) means the magnetic trip activates between 5 and 10 times the rated current — so for a 1 A breaker, instantaneous trip occurs between 5 A and 10 A. The 1.2 W power loss per pole at rated current in hot operating state is low enough that derating in a crowded DIN-rail enclosure is minimal — but if you pack 12 of these in a row, still check the ambient temperature inside the panel against the -40 to 75 °C range.
Deployment context
Snaps onto DIN rail (35 mm) and occupies 1 modular width unit (18 mm).