Square D MasterPact NW25H1 LSIG 2500A

The Square D MasterPact NW25H1 LSIG 2500A air circuit breaker is a high-performance low-voltage power protection solution designed for critical industrial, commercial, and infrastructure applications. Built on Schneider Electric’s proven MasterPact NW platform, this breaker provides superior reliability, high interrupting capacity, and advanced electronic protection to safeguard electrical distribution systems operating up to 2500A.

Equipped with LSIG (Long-time, Short-time, Instantaneous, and Ground-fault) protection functions, the NW25H1 ensures precise coordination and comprehensive fault protection across complex electrical networks. The adjustable trip parameters allow engineers to optimize protection settings, reduce nuisance tripping, and maintain system continuity even under demanding operating conditions. The H1 performance level delivers high breaking capacity, making it suitable for installations with elevated fault current requirements such as manufacturing plants, data centers, hospitals, marine systems, and utility substations.

The MasterPact NW series is engineered with a modular architecture that simplifies installation, maintenance, and future upgrades. Its drawout design (depending on configuration) enables quick removal and replacement, minimizing downtime during servicing. Integration with Micrologic electronic trip units provides real-time monitoring, metering, and communication capabilities for smart energy management and predictive maintenance strategies.

Durability and safety are core advantages of the NW25H1. The breaker incorporates advanced arc-handling technology, robust mechanical endurance, and multiple safety interlocks to protect both equipment and personnel. Compatibility with modern communication protocols also allows seamless integration into building management systems (BMS) and industrial automation platforms.

Overall, the Square D MasterPact NW25H1 LSIG 2500A offers dependable circuit protection, operational flexibility, and intelligent monitoring—making it an ideal choice for mission-critical low-voltage distribution environments where performance and uptime are essential.