The MGN25128 is a Schneider Electric C60H miniature circuit breaker from the Multi9 range — a 3-pole, D-curve unit rated 6 A at 50 °C per EN/IEC 60947-2. It snaps onto 35 mm symmetrical DIN rail and occupies 6 module pitches (54 mm wide).
Rated Icu of 30 kA at 240 V AC phase-to-phase, 15 kA at 415 V, and 10 kA at 440 V. The Ics (service breaking capacity) is 50 % of Icu at each voltage — 15 kA at 240 V, 7.5 kA at 415 V, 5 kA at 440 V. That Ics figure governs the number of fault clearances the breaker can handle before replacement; for a distribution board where faults are rare, the Icu is the headline number for SCCR coordination upstream.
D-curve trip and thermal-magnetic internals
Magnetic tripping threshold is 12 x In ±20 %, so the D curve holds through motor inrush and transformer magnetising current without nuisance trips. Thermal-magnetic trip unit handles overload protection via the bimetal element and short-circuit via the solenoid.
Fixed mounting on 35 mm DIN rail. IP20 finger-safe protection on the front. Ambient operating range -30…70 °C, storage -40…80 °C.