Square D LV426866 Circuit Breaker Accessories

LV426866 is Square D’s pre-wired shunt-trip release MX accessory for ComPacT NSXm and PowerPact B-Frame molded-case circuit breakers. When energized by a control voltage, the shunt-trip triggers the breaker to open, enabling remote shutdown in safety interlock and emergency-stop schemes within industrial switchgear and motor-control centers. The device supports two common control-voltage ranges: 380–415 VAC at 50 Hz and 440–480 VAC at 60 Hz, making it suitable for both international and North American installations. It is specified for PowerPact B-Frame breakers (15–125 A) and for NSXm-series units, and it ships as a pre-wired assembly mounted to the breaker to simplify wiring and installation. To ensure correct operation, pair LV426866 with the appropriate breaker family and voltage class and follow applicable electrical codes and safety practices during installation. This LV426866 shunt-trip accessory is part of Schneider Electric’s Square D line of circuit-breaker accessories, commonly used in industrial distribution panels, switchboards, and motor-control centers where a remote trip signal is required.