UL 1077 and CSA C22.2 No. 235 listing at 5 kA means it is recognized for supplementary protection in North American panels — not a branch-circuit rated device under UL 489, but accepted downstream of a main breaker. DC rating to IEC 60947-2: 15 kA at 72 V maximum — usable in DC control buses or battery-backed circuits within that voltage ceiling. Temperature derating per the spec: full rating up to 55 °C, then linearly reduced current from 55 °C to 75 °C (95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C). If your enclosure runs hot, you must derate or the breaker may trip thermally below 3 A.
Mechanical fit — snaps onto DIN rail
Mounts via quick assembly system (integral clip) onto 35 mm DIN rail. Occupies 3 width units (54 mm). Depth 76 mm, height 90 mm — clearance for the arc chamber and terminals. Any mounting position allowed. Combined terminal at top and bottom accepts busbar or cable. Sealable cover option (yes) lets you lock the handle position for lockout/tagout compliance.