Schneider Electric M9F43103 Miniature Circuit Breaker

Schneider Electric's Multi9 M9F43103 is a 1-pole miniature circuit breaker (MCB) in the C60BP family, rated for 277 V AC with a 3 A trip rating and a D-curve trip characteristic for coordinated overload protection. It uses a tunnel-terminal connection for secure wiring in distribution panels and is designed for use in residential or light-commercial circuits where compact protection is required. This M9F43103 carries UL 489 listing with a short-circuit current rating up to 14 kA and IEC/EN 60947-2 compatibility with a 10 kA rating, reflecting its suitability across North American and international standards. As part of the Schneider Electric Multi9 line, it provides reliable single-pole protection in compact enclosures, making it a practical choice for 277 V branch circuits that demand a precise 3 A protective level and a robust, code-compliant performance.