Square D | MA36400CBA | Circuit Breaker | 400A | 3-Pole | 600V

Square D MA36400CBA Circuit Breaker — 400A, 3-Pole, 600V

Designed for demanding electrical distribution tasks, this Square D MA36400CBA circuit breaker delivers reliable protection for 3‑phase systems up to 600V. With a robust 400A current rating and a 3‑pole configuration, it’s engineered for heavy‑duty service in commercial and industrial environments where consistent performance matters.

• Amperage: 400A
• Poles: 3‑Pole (3‑phase protection)
• Voltage: 600V maximum system voltage
• Part reference: MA36400CBA—use this exact designation to ensure compatibility with Square D panels and assemblies

Why this model stands out

• Precise compatibility—Replacements and retrofits rely on exact part numbers. The MA36400CBA designation is your best reference to match the panel, mounting style, and electrical characteristics required by your installation.
• 3‑phase protection—The 3‑pole design supports balanced protection across all phases, reducing the risk of unbalanced faults in large equipment and multi‑motor loads.
• High‑current capability—Suitable for feeders and circuits that demand substantial current without compromising safety or reliability.
• Versatile use cases—Ideal for maintenance, retrofit, or replacement projects where existing infrastructure relies on this specific Square D model.

Use cases and ideal applications

• Upgrading electrical distribution in commercial facilities, industrial plants, or data centers where a 400A, 3‑pole breaker is appropriate.
• Retrofitting older panels to restore reliable protection for high‑demand machinery, compression systems, or large HVAC equipment.
• Replacing a failed breaker in systems that require exact MA36400CBA compatibility to maintain panel labeling and protection coordination.

Important installation note

Before ordering, confirm fit and ratings for your specific panel and system. The MA36400CBA part number is the best reference for compatibility, and proper matching ensures safe operation and code compliance. Installation should be performed by qualified personnel following all applicable electrical standards and manufacturer instructions.

Practical guidance for your project

• Cross‑check the panel’s listing and the device’s rating labels to confirm a precise match.
• Keep the part number handy in project records to avoid mismatches during future maintenance or replacements.
• Document the installation context (voltages, amperage, and phase configuration) so future technicians can verify continued suitability for the load profile.