Schneider Electric M9U21104 Miniature Circuit Breaker

Schneider Electric M9U21104 is a 1-pole Miniature Circuit Breaker from the Multi9 C60H-DC family, rated at 4 A with a C-curve trip characteristic for DC networks up to 250 V. It supports a high short-circuit interrupting capacity, listed up to 10 kA at 250 V DC on Schneider Electric product pages, with regional listings detailing UL 1077 ratings of 5 kA and IEC/EN 60947-2 ratings of 6 kA depending on the market. As a DC-rated MCB, it is suited for protection of low-voltage DC circuits in compact panels, including applications in control gear, telecom infrastructure, and solar installations, where a small, single-pole device can safeguard wiring and components from overcurrent events. The M9U21104 designation places it squarely in the Multi9 line, signaling consistent protection characteristics within the family while preserving standard 1P mounting and wiring interfaces.