Schneider Electric MA11212 Auxiliary Switch

Schneider Electric MA11212 Auxiliary Switch is a 1NO-1NC auxiliary switch assembly designed to pair with Square D MA and MH frame molded-case circuit breakers to provide an additional signaling or control contact. It is compatible with MA, MAF, MAL, MAP, MH, MHF, MHL, and MHP frame breakers and plugs into the breaker assembly so the auxiliary contact operates in concert with the main switch. The switch is rated for 125 to 250 VAC and uses 18 AWG copper leads for connection, making it suited to standard panel wiring practices. The MA11212 configuration delivers one normally open and one normally closed contact (1NO-1NC), and when installed in a circuit breaker the suffix -1212 identifies this contact arrangement. This Schneider Electric accessory is part of the Square D legacy line and is used to expand a breaker’s signaling or control capability in electrical distribution panels. By adding the MA11212, engineers can monitor breaker status or trigger auxiliary circuits without altering the primary switching path.