ABB | T5HD-4P-400A | Circuit Breaker | 400A | 4-Pole

ABB T5HD-4P-400A Circuit Breaker is a 400 A, four‑pole protection device engineered for reliable overcurrent protection in service entrances, distribution panels, and retrofit projects. When exact specifications matter, this part delivers a precise fit and consistent performance that electricians and panel builders trust.

Why this breaker stands out

Designed to support maintenance, retrofit, and replacement tasks, the T5HD-4P-400A provides the robust protection your electrical system requires without complicating your upgrade path. Its four-pole configuration is ideal for multi-wire and three‑phase applications where coordinated protection and clear isolation are essential.

Key specifications

• Amperage: 400 A
• Poles: 4‑Pole
• Configuration: T5HD series molded-case circuit breaker suitable for panel or distribution board use
• Compatibility note: Confirm fit and ratings before ordering—the part number (T5HD-4P-400A) is the best reference for compatibility.

Use cases and practical benefits

This breaker is ideal for scenarios where you need a reliable, like-for-like replacement or a retrofit to support higher loads in an existing panel. Consider these common applications:

• Panel maintenance: Swap in a matched 400 A, 4‑pole unit to restore protected circuits quickly and securely.
• Retrofit projects: Upgrade to a 400 A capacity in panels that require four-pole protection to accommodate added loads or reconfigured layouts.
• Replacement parts: Use the exact part number to ensure electrical characteristics align with your original equipment, preserving trip behavior and protection coordination.

Compatibility guidance

To minimize downtime and ensure proper operation, verify the exact fit using the provided part number. While shopping, keep in mind:

• The T5HD-4P-400A designation identifies the correct amperage, pole count, and family type for most ABB panels and compatible assemblies.
• Always compare the panel’s documented requirements and the breaker's ratings before finalizing the order.

What you gain with ABB

Choosing this ABB circuit breaker means you’re selecting a component designed with dependable protection in mind, streamlined installation, and a clear path for future upgrades. It supports safe shutoff, predictable trip behavior, and dependable performance across demanding electrical environments.

With the ABB T5HD-4P-400A, you’ll have a precise, ready-to-install solution for maintaining, upgrading, or replacing essential protection in your electrical infrastructure.