Schneider Electric MA11212 U Three-Phase Circuit Breaker

MA11212U is an auxiliary switch designed for use with Square D/Schneider Electric MA-series molded‑case circuit breakers, compatible with MA, MAF, MAL, MAP, MH, MHF, MHL, and MHP breaker frames. It provides remote signaling through a single normally open and one normally closed contact (1NO-1NC), enabling simple status indication or control interlocks in electrical distribution systems. The switch is rated for 10 A at 125/250 VAC and 5 A at 30 VDC, and it uses two 18 AWG copper leads; when installed in a breaker, the suffix is -1212. This component is an accessory for MA-family breakers, not a standalone circuit breaker, and it supports control or alarm applications tied to the breaker position or status.