The B-curve (3–5× In magnetic trip) means this breaker tolerates inrush from resistive loads and general-purpose circuits but will nuisance-trip on motor or transformer starts. For 13 A B-curve, expect instantaneous trip between 39 A and 65 A. Rated insulation voltage is 440 V AC, and the maximum operating voltage for multi-phase operation is 440 V AC, so this single-pole unit is suitable for 240 V line-to-neutral or 277 V (if within the 240 V AC rated supply voltage — note the 240 V figure governs the breaking capacity rating). The 20 000 mechanical switching cycles are typical for a residential-grade MCB; this is not a high-cycling motor-switching device. Ambient temperature range is -20 to +45 °C, with periodic excursions to +55 °C at 95% humidity — fine for a ventilated enclosure but not for direct steam or washdown zones.
Suitable for enclosed distribution boards only.