Eaton | HLD3400Y | Circuit Breaker | 400A | 3-Pole | 600V

The Eaton HLD3400Y 400A, 3-Pole, 600V circuit breaker is a purpose-built solution for maintenance, retrofit, and replacement projects where exact specifications matter. Identified by the part number HLD3400Y, this unit is designed to fit Eaton-compatible systems and deliver reliable protection for demanding electrical setups.

Key specifications

• Amperage: 400 A
• Poles: 3-Pole
• Voltage: 600 V

Why choose the HLD3400Y

• Exact spec alignment for maintenance, retrofit, and replacement—minimizing guesswork and downtime.
• Part-number clarity: using HLD3400Y as the reference ensures compatibility with matching Eaton panels and feeders.
• Three-pole design delivers balanced protection across three-phase systems, suitable for commercial and light-industrial applications.
• Built to handle higher-voltage distribution up to 600V, safeguarding connected equipment and maximizing circuit reliability.
• Direct replacement mindset: designed to integrate with existing Eaton protection schemes, making spares management simpler.

Ideal use cases

• Main or feeder protection in three-phase electrical panels for industrial facilities and manufacturing lines.
• Retrofit projects where current hardware requires an exact 400A, 3-pole, 600V specification.
• Replacement for worn or obsolete breakers in retrofit or service upgrade scenarios within Eaton-equipped installations.

How to verify fit and order confidently

Before ordering, confirm that your panel or switchgear supports a 400A, 3-Pole, 600V protection device and that the form factor aligns with your existing mounting and bus configuration. The part number HLD3400Y is the most reliable reference for compatibility, so cross-check it against your panel model and manufacturer documentation to ensure a seamless match.

What to expect after installation

With the HLD3400Y installed, you’ll gain dependable overcurrent protection for critical three-phase circuits, helping prevent equipment damage from surges and faults. The 400A rating supports substantial load demands, while the 3-pole configuration ensures coordinated protection across all phases in your system. This makes it a practical, durable choice for ongoing reliability in demanding electrical environments.