Eaton | HLD3400W | Circuit Breaker | 400A | 3-Pole | 600V

The Eaton HLD3400W Circuit Breaker is a purpose-built solution for maintenance, retrofit, and replacement projects where exact specifications matter. With a robust 400A rating, a three-pole design, and a 600V signaling range, this unit is tailored to support reliable protection in demanding electrical environments while keeping your panel architecture consistent with Eaton’s system compatibility.

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V
• Compatibility reference: Part number HLD3400W is the best guide for fitment

Why engineers and electricians choose the HLD3400W

Designed to meet the needs of three-phase systems, this 3-pole breaker provides coordinated overcurrent protection across all three hot legs. The 600V rating expands its suitability for industrial and commercial installations, while the 400A capacity supports higher current loads without compromising protection. Because the part number is the clearest compatibility signal, confirming a match with HLD3400W before ordering helps avoid field fit issues and delays.

Ideal use cases

• Maintenance jobs that require a direct, spec-matched replacement within existing Eaton equipment.
• Retrofits where upgrading to a higher-current protection device is necessary without reconfiguring panel hardware.
• Replacement in service panels and distribution equipment that demand exact 3-pole, 400A, 600V characteristics.

Compatibility and installation notes

Before purchasing, verify fit and ratings against your panel’s requirements. The HLD3400W is presented as the best reference for compatibility, so cross-check the part number with your equipment catalog or service manual. Installation should be performed by a licensed electrician, especially when working with 600V systems, to ensure safe operation and proper enclosure coordination.

Practical considerations and guidance

• Keep reliance on the exact Eaton part number to minimize field mismatch risks during maintenance or replacements.
• Plan for a straightforward swap in compatible Eaton assemblies, reducing downtime and ensuring consistent protection across the circuit.
• Consider inventory planning for critical spares in industrial environments where uninterrupted protection is essential.

With the Eaton HLD3400W, you get a purpose-built 400A, 3-pole, 600V circuit breaker designed to slot into compatible Eaton configurations, delivering reliable overcurrent protection while aligning with your existing electrical infrastructure. Use the part number as your primary compatibility reference to ensure a seamless fit and dependable performance.