It breaks fault currents up to 4.5 kA per EN 60898 at 230 V AC, 50/60 Hz. For a typical residential or light commercial distribution board fed by a 100 A service, that's adequate headroom for the branch circuit.
Occupies 1 modular width unit (18 mm) on standard DIN rail. Mounting position is unrestricted — vertical, horizontal, or inverted. The housing is IP20 with conductors connected, so it's intended for enclosed distribution boards, not wet or dusty environments.
Thermal derating and service life
Derates to 15.04 A at 40 °C and 14.56 A at 45 °C — per the datasheet, that's the continuous current the bimetal strip will carry without nuisance tripping. Mechanical endurance is 10 000 switching cycles typical.