Schneider Electric LV429123 MA12.5 is a magnetic trip unit for ComPact NSX100 circuit breakers, delivering a fixed 12.5 A magnetic trip setting on 3-pole NSX100 devices (3P3D). Designed for NSX100-250 breakers, this trip unit installs in NSX100N frames to provide instantaneous short‑circuit protection across three phases. The LV429123 order number corresponds to the MA12.5 trip unit and is used to configure or upgrade NSX100 circuit breakers for magnetic overcurrent protection.
