ABB | T5N-3P-400A | Circuit Breaker | 400A | 3-Pole | 600V

The ABB T5N-3P-400A circuit breaker delivers robust, three-pole overcurrent protection for 600V electrical systems, engineered for reliability in demanding industrial environments. With a 400A rating, this unit is purpose-built for maintenance, retrofit, and replacement projects where exact specifications matter. When sourcing replacements, the part number T5N-3P-400A is the most dependable reference for compatibility, ensuring a seamless fit into your existing ABB panels and switchgear.

What makes this breaker stand out is its alignment with ABB’s T5N family, offering consistent performance and dependable protection across your distribution network. It’s designed to slot into standard 3-pole configurations, providing clear, predictable trip behavior and compatibility with established busbar layouts. If your goal is to modernize a panel, restore service after a fault, or stock a precise spare part for critical lines, this 400A, 3-Pole, 600V device is engineered to meet those needs without unnecessary customization.

Key specifications

• Amperage: 400 A
• Poles: 3-Pole
• Voltage rating: 600 V
• Part reference: T5N-3P-400A
• Recommended use: maintenance, retrofit, and replacement in compatible ABB panels
• Compatibility note: Confirm fit and ratings before ordering; the part number is the best reference for compatibility

Who this is for

Ideal for facility managers, electrical contractors, and plant engineers responsible for reliable power distribution in manufacturing, processing, or large commercial environments. If you’re maintaining legacy equipment, upgrading protection schemes, or building a spare parts inventory for critical lines, the ABB T5N-3P-400A is designed to integrate smoothly with existing ABB installations and shorten downtimes.

How it helps your operation

By delivering accurate 400A, 3-pole protection at 600V, this breaker minimizes unplanned outages and protects both equipment and personnel. Its compatibility with the ABB T5N platform ensures consistent electrical characteristics across upgrades and replacements, reducing the risk of mismatched protections that can complicate maintenance. For retrofit projects, using the exact part reference simplifies procurement and speeds up service during scheduled shutdowns.

Practical guidance and best practices

• Always verify panel labeling and confirm the 600V rating and 400A capacity before replacement.
• Keep a precise spare on hand for planned maintenance in critical facilities to reduce downtime.
• Follow your local electrical codes and the equipment manual during installation to ensure safe, correct operation.

Choose the ABB T5N-3P-400A circuit breaker when you need reliable, compatible protection that aligns with ABB systems, delivers clear, predictable performance, and supports efficient maintenance, retrofit, or replacement workflows in 600V applications.