Description

Merlin Gerin Masterpact M40 H2 4000A

The Merlin Gerin Masterpact M40 H2 4000A is a premium‑grade low‑voltage air circuit breaker engineered to deliver reliable protection, high interrupting performance, and robust switching capability for industrial, commercial, and utility power distribution systems. As part of the renowned Masterpact series from Schneider Electric, this breaker combines advanced protection intelligence with rugged mechanical design to ensure superior safety, continuous operation, and long‑term reliability in demanding electrical environments.

Rated at 4000 amperes, the Masterpact M40 H2 breaker is ideally suited for use in heavy‑duty power distribution applications such as main and feeder circuits in large switchgear assemblies, data centers, manufacturing plants, infrastructure facilities, and commercial buildings with high energy demands. Its high current capacity and interrupting capability enable it to quickly and effectively isolate electrical faults, helping to protect critical equipment and maintain system stability.

The breaker typically incorporates an advanced electronic trip unit that delivers configurable protection functions including long‑time, short‑time, instantaneous, and optional ground‑fault elements. This flexible protection allows precise coordination with upstream and downstream devices, optimizing selectivity and minimizing unnecessary outages while enhancing overall system safety.

Constructed with durable contact systems, high‑performance arc‑interruption technology, and robust structural components, the Masterpact M40 H2 supports frequent operation under heavy load conditions and provides extended service life with minimal maintenance. Its modular and accessible design simplifies installation, inspection, servicing, and future upgrades, which reduces lifecycle costs and enhances uptime.

The breaker can also be equipped with optional accessories like auxiliary contacts, shunt trips, undervoltage releases, and communication modules for seamless integration with power monitoring, automation, and building management systems—enabling enhanced control, diagnostics, and remote operation.

Engineered to meet rigorous industry safety and performance standards, the Merlin Gerin Masterpact M40 H2 4000A is a dependable and flexible solution for modern low‑voltage power distribution systems where reliability, protection, and continuity are mission‑critical.