The MGN60649 is a Schneider Electric C60H miniature circuit breaker from the Multi9 range, built for DC distribution panels where a 4-pole, 3 A C-curve thermal-magnetic trip is needed. What sets this one apart is the DC-side breaking capacity: 50 kA Icu at 250 V DC, which is the number you care about when protecting battery banks or rectifier outputs — the AC ratings (30 kA at 240 V, 15 kA at 415 V) are there for dual-use circuits but the DC figure is the headline. It snaps onto a 35 mm DIN rail, occupies 8 modules (72 mm wide), and the C-curve means magnetic trip between 5 and 10 times rated current — standard for general distribution and moderate inrush loads like small transformers or capacitor banks.
The service breaking capacity (Ics) at the same voltage is also 50 kA (100 %), meaning it can clear that fault level repeatedly without degrading, which is rare for DC breakers and gives you real selectivity headroom in a string of panels. On the AC side, the Ics drops to 50 % of Icu (15 kA at 240 V, 7.5 kA at 415 V), so if your circuit sees repeated AC faults near the maximum, plan for replacement after the first event. If your panel ambient runs cooler, you get some headroom; above 50 °C, derate per the standard thermal curve. The magnetic trip threshold is 8.5 x In ±20 %, so it holds through motor inrush and capacitor charging currents up to about 25 A peak before instantaneously opening.
Panel integration
The 4-pole body takes 8 module pitches (72 mm wide, 81 mm tall, 73 mm deep). The toggle actuator gives local ON/OFF indication, and the contact position indicator confirms isolation visually — important for lockout/tagout. Comb busbars and distribution blocks can feed from top or bottom. Earth-leakage protection requires a separate Vigi block — not integrated.