The 1 A rating at 400 V AC is the continuous current the breaker carries without tripping under normal conditions — sized for a 1 A load branch, not a motor feeder. The 10 kA breaking capacity per EN 60898 means it safely interrupts a short-circuit fault up to 10 kA at 400 V, which is the standard domestic and light industrial SCCR level for this class. The B characteristic (3–5× In magnetic trip) avoids nuisance trips on cable charging currents but will clear a hard short quickly.
Snap-on DIN rail mount, any position. The 18 mm width (1 modular unit) and 70 mm installation depth fit standard distribution board cutouts. Ambient range spans -40 °C to 75 °C, with humidity derating above 55 °C (max 95% RH at 55 °C, dropping to 35% at 75 °C). Vibration resistance per IEC 60068-2-6 (±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz) confirms railway and machine-mount suitability.