B-curve tripping (3–5× In) means this breaker holds through modest inrush — think lighting, resistive heaters, general-purpose outlets — but will nuisance-trip on motor-start surges. If the load has a motor or transformer inrush, step to a C-curve sibling. Rated 25 A continuous at 400 V AC. Also carries 250 V AC single-phase rating. The 440 V max multi-phase rating covers 3-phase line-to-line applications. At 50 Hz only.
Mount in any position. IP20 with conductors connected, so it belongs inside a closed enclosure, not in a wet location. Sealable and touch-protected. No neutral switching function — this pole breaks the phase only.