ABB | T5N-4P-400A | Circuit Breaker | 400A | 4-Pole

Meet the ABB T5N-4P-400A circuit breaker—an industrial-grade protection device built to withstand demanding 3-phase environments. Identified by the precise part number T5N-4P-400A, this 400A, 4-pole breaker is tailored for maintenance, retrofit, and replacement projects where exact specifications matter. When you need a reliable, drop-in solution that aligns with ABB switchgear and compatible panels, this unit delivers.

Specifications at a glance

• Amperage: 400 A
• Poles: 4-Pole
• Part reference: T5N-4P-400A
• Target use: maintenance, retrofit, replacement in industrial electrical systems

Why choose the ABB T5N-4P-400A

• Exact-fit compatibility: The part number T5N-4P-400A is the most reliable reference for matching ABB equipment and compatible switchgear, reducing the guesswork during procurement.
• Four-pole protection: A four-pole design ensures simultaneous disconnection of all current-carrying conductors, which is essential for full isolation in 3-phase systems with a neutral or associated control circuits.
• Industrial reliability: ABB’s legacy of robust protection means fewer nuisance trips and dependable performance in demanding environments.
• Maintenance-friendly orientation: Designed to fit into standard panels and retrofit scenarios, making replacements straightforward without extensive panel modification.

Ideal use cases

• Upgrading service panels in manufacturing facilities or large workshops requiring 400A main protection.
• Retrofit projects where existing gear needs a like-for-like ABB replacement to maintain your electrical protection scheme.
• Replacement of worn or obsolete breakers in industrial distribution boards, motor control centers, and switchgear assemblies.
• Applications demanding reliable isolation across all phases and neutral paths in 3-phase systems.

Practical guidance for installation and procurement

Before ordering, verify fit and ratings against your panel or switchgear specifications. The T5N-4P-400A part number is the clearest reference for compatibility, so keep it handy during procurement and cross-check with your existing ABB components. This unit is intended for installations where 400A capacity and four-pole protection are required, ensuring consistent performance across maintenance cycles and system upgrades.

What problems this solves

For facilities upgrading electrical infrastructure or replacing aging protection devices, the ABB T5N-4P-400A provides a dependable, plug-in solution that aligns with ABB standards. It minimizes downtime by simplifying part matching, ensures complete circuit isolation in complex 3-phase systems, and supports safer, more predictable protection across critical plant equipment.