The MGN25090 is a 1-pole C60H miniature circuit breaker from the Multi9 range, rated 40 A at 50 °C per EN/IEC 60947-2. The D-curve magnetic trip limit of 12 x In (±20 %) means it holds through motor inrush without nuisance tripping — sized for distribution or motor feeder circuits where the starting surge exceeds 8 x In. The 15 kA Icu at 240 V AC (phase-to-neutral) is the maximum fault current it can safely interrupt; the service breaking capacity Ics is 7.5 kA (50 %) at the same voltage, so for a 240 V panel with available fault current under 7.5 kA the breaker can be reclosed after a fault without replacement. The tunnel-type terminals accept 1.5 to 35 mm² rigid or flexible conductors; tighten to 3.5 N·m. IP20 finger-safe front, pollution degree 3 rated — suitable for standard control panels, not washdown environments.
The suitability-for-isolation marking (visible ON/OFF indication and contact position indicator) means it can serve as a disconnecting means per the standard — no separate isolator needed upstream in a 240 V single-phase feeder.