The Schneider Electric MGN61846 is a Multi9 C60H-DC miniature circuit breaker — a 2-pole, 6 A thermal-magnetic unit with a C-curve trip characteristic, purpose-built for DC distribution circuits. Rated breaking capacity reaches 20 kA Icu at 250 V DC and 10 kA Icu at 440 V DC per EN/IEC 60947-2, which means it can safely interrupt high-energy DC faults without cascading upstream — critical for battery banks, UPS outputs, and solar combiner boxes where DC arc extinction is harder than AC. The magnetic trip threshold is fixed at 8.5 x In ±20% DC, so it rides through motor inrush and capacitive charging currents on DC bus lines without nuisance tripping.
DC-rated interrupting performance
Unlike a standard AC MCB, the C60H-DC is rated for DC interruption across multiple voltage points: 20 kA at 220/250 V DC, 10 kA at 440 V DC, and 6 kA at 500 V DC. The 500 V DC insulation voltage (Ui) confirms the internal clearance and creepage are designed for series-stacked battery strings up to that potential.
Panel integration
Tunnel-type terminals accept up to 25 mm² rigid stranded or 16 mm² flexible — strip 14 mm, torque to 2.5 N·m. Pollution degree 3 per EN 60947-2 and tropicalisation class 2 per IEC 60068-2 mean the breaker is rated for conductive environments (condensation, occasional dust) and high-humidity storage up to 95% RH at 55 °C — typical for unheated electrical rooms in tropical climates.