Schneider Electric M9F21350 Circuit Breaker

Schneider Electric M9F21350 is a three‑pole Miniature Circuit Breaker from the Multi9 C60SP family, rated at 50 A with a B‑curve trip characteristic for three‑phase protection. This UL 1077‑listed device delivers a 5 kA breaking capacity under UL 1077 conditions and a 10 kA breaking capacity under IEC/EN 60947‑2, reflecting compatibility with both U.S. and international standards. The M9F21350 designation identifies a 3P, 50A model within Schneider Electric's Multi9 lineup, designed to interrupt overcurrents quickly and safely in three‑phase circuits. As part of Schneider’s protection portfolio, it provides reliable overcurrent protection for feeders in electrical installations, enabling clear coordination with other protective devices and helping prevent damage from overloads or short circuits. The B‑curve indicates its normal‑range response to overloads, delivering prompt tripping for standard fault conditions while avoiding nuisance trips from typical inrush events. The Multi9 C60SP family is widely used in commercial and light‑industrial applications where compact, standards‑compliant protection for three‑phase circuits is required.