Enclosed Circuit Breakers (ECBs)
MCXP Solutions provides enclosed circuit breaker solutions designed for industrial, commercial, and mission-critical power distribution applications. Our enclosed circuit breakers combine reliable overcurrent protection with durable enclosure options, helping facilities protect equipment, control electrical loads, and maintain safer operating conditions. From standard enclosed molded case breakers to custom-configured assemblies with electronic trip units, rotary handles, control power components, and safety features such as ERMS, MCXP delivers practical solutions built around your project requirements, timeline, and compliance needs.
Reliable, Code-Compliant Disconnect Solutions for Every Application
Keep people and equipment safe—and get power back online fast—with MCXP Solutions’ Enclosed Circuit Breakers. Built with individually UL-rated components and engineered for real-world reliability, our ECBs deliver a code-compliant means of disconnect for virtually any commercial or industrial application. We stock common frames and enclosure styles for quick-ship turnarounds, and we customize builds to your one-line, spec, and site conditions.
What Is an Enclosed Circuit Breaker?
An enclosed circuit breaker is a molded-case circuit breaker (MCCB) mounted inside a protective NEMA-rated enclosure. It provides local overcurrent protection and a lockable, visible means of disconnect, often required by code for service entrances, feeders, and large equipment. MCXP standardizes on rugged enclosures and proven MCCB platforms so you get dependable performance with shorter lead times.
Standard Scope & Ratings
*Final labeling and rating depend on specific bill-of-materials and jurisdictional requirements.
Molded Case Circuit Breaker Solutions
This enclosed circuit breaker assembly includes a 1200A frame molded case circuit breaker with an electronic trip unit for adjustable protection settings. Features may include long time, short time, instantaneous, and ground fault protection, along with rotary handle operation, UL listed components, and ERMS functionality to help reduce arc flash energy during maintenance.
MCXP can configure enclosed breaker assemblies with the right enclosure type, operating handle, accessories, and protection features to support the requirements of your project.
Why Choose MCXP Enclosed Breakers?
Quick-Ship Advantage
Factory lead times on disconnects can stall projects. MCXP carries common frame sizes, operators, and enclosures so we can build, test, and ship fast—without compromising safety or documentation.
Built for Your Environment
From climate-controlled mechanical rooms to coastal sites and washdown areas, we package breakers in the right enclosure for the job: NEMA 1 (indoor), 3R (outdoor), 4 (hose-down), 4X (corrosion-resistant stainless), and 12 (dust-tight). Hazardous-location builds (NEMA 7/9) are available for classified areas.
Flexible Operation & Integration
Pick flange or rotary operators, add door interlocks, and specify auxiliary contacts for remote status. We also provide cam-lock inlets, Kirk®/Castell® key interlocks, and labeling packages to fit your lockout/tagout and switching procedures.
Proven Protection
Every ECB is configured around a high-reliability MCCB platform, with options for ground-fault protection (GFP), 100% rated breakers, and Arc Flash Reduction Maintenance modes (ERMS/RELT/DAS/ARMS) to help reduce incident energy during maintenance.