The MGN61872 is a Schneider Electric Multi9 C60H-DC miniature circuit breaker — a 1-pole, 40 A thermal-magnetic DC breaker with a K curve, designed for distribution applications on DC networks. Rated breaking capacity is 20 kA Icu at 110 V DC, 10 kA at 220 V DC, and 6 kA at 250 V DC, all conforming to EN/IEC 60947-2. The K-curve magnetic tripping limit is 12 x In +/- 20 % DC, which means it trips magnetically between roughly 9.6 and 14.4 times rated current — suited for loads with moderate inrush, like DC motor circuits or battery-backed supplies. It carries IP20 protection on the terminals and IP40 on the modular enclosure, so it's intended for enclosed panel mounting, not washdown environments.
Terminal & Wiring Details
Tunnel-type terminals accept a wide range of conductors: 1 to 35 mm² rigid stranded (AWG 18 to AWG 2) for a single cable, or up to 3 x 4 mm² flexible stranded. The breaker is padlockable and has a toggle control with ON/OFF indication and a contact position indicator.