Square D ME4CT2 400A Circuit Breaker

Meet the Square D ME4CT2 400A Circuit Breaker — a rugged, high-capacity protective device built for demanding electrical environments. Part of Square D’s trusted ME series, this 400-amp breaker is designed to deliver reliable overcurrent protection for major feeders and main service circuits in commercial and light-industrial panels.

Why this breaker stands out

• 400 A current rating provides robust protection for heavy-load circuits, helping prevent equipment damage and unexpected outages.
• Part Number ME4CT2 ensures precise replacement in compatible Square D installations, simplifying procurement and installation.
• ME-series compatibility means seamless integration with Square D panels and switchgear, enabling coordinated protection across the power distribution system.
• Durable molded-case construction delivers reliable performance in real-world electrical environments, with solid construction designed to withstand heat and vibration typical of industrial settings.
• Thermal-magnetic trip mechanism provides fast, predictable response to overloads and fault conditions, helping to isolate problems quickly and minimize downtime.
• Compact form factor optimizes space in crowded panels, making it easier to plan and wire large distribution schemes without compromising protection.

Ideal applications

• Main service disconnects in commercial buildings and light-industrial facilities that require a reliable 400A protection device.
• Main feeders or large branch circuits within distribution panels that are designed to accept ME-series breakers.
• Replacement for existing ME4-series breakers to maintain system compatibility and protection coordination.

What you gain by choosing the ME4CT2

• A trusted, brand-name solution from Square D that aligns with other protection devices in your system, reducing compatibility concerns.
• Clear, confident protection for high-load circuits, helping keep critical equipment operational and reducing the risk of cascading faults.
• Streamlined maintenance and replacement with a readily identifiable 400A part that matches your existing panel labeling and wiring schemes.

Tips for installation and use

• Confirm that your panel accepts ME-series breakers and that the interrupting rating matches your system requirements.
• Follow proper safety procedures during replacement: de-energize, discharge stored energy, and use appropriate PPE.
• Consider pairing this main-breaker solution with compatible Square D accessories to maintain proper switching, labeling, and protection coordination.

In summary, the Square D ME4CT2 400A Circuit Breaker is a purpose-built, dependable choice for safeguarding high-current circuits in demanding electrical installations. With its 400-amp rating and ME-series compatibility, it delivers clear, scalable protection and straightforward integration into your power distribution strategy.