The MGN61518 is a Schneider Electric Multi9 C60H-DC single-pole DC miniature circuit breaker rated 50 A at 25 °C, with a C-curve trip characteristic (magnetic tripping at 8.5 x In ±20%). It breaks up to 10 kA Icu at 220 V DC per IEC 60947-2 and GB 14048.2, with symmetrical ratings of 20 kA at 110 V DC and 6 kA at 250 V DC. The thermal-magnetic trip unit handles DC network protection in distribution panels where overcurrent and short-circuit isolation are needed on a single pole.
DC breaking capacity — what the ratings mean
At 110 V DC the interrupting rating doubles to 20 kA, which covers most low-voltage DC bus faults in telecom or battery-backed distribution. The 6 kA at 250 V DC is the ceiling for higher-voltage strings. All three ratings are symmetrical per IEC 60947-2 — the breaker is certified to the same standard as AC industrial breakers, but optimized for DC arc extinction. The limitation class of 3 means it lets through a limited amount of let-through energy, which aids downstream component coordination.
Clip-on DIN-rail mount, 2 modules of 9 mm pitch (18 mm wide). The 73 mm depth leaves clearance in standard 80 mm deep enclosures. Strip length is 14 mm.