Eaton HLD3400C - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Eaton HLD3400C - 400 A, 600 V, 3-Pole Circuit Breaker from AmpState is a compact, molded-case breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built for practical, real-world electrical protection, this unit is ideal for residential, commercial, and light industrial setups where space efficiency matters and reliability counts.

Why this breaker stands out

• Space-efficient molded-case design: A compact footprint helps you maximize panel space without compromising protection, making it a smart choice for tight electrical layouts.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection by responding to both overload and short-circuit conditions, minimizing nuisance trips and ensuring steady operation of connected equipment.
• OEM-loadcenter compatibility: Engineered to be compatible with matching Eaton OEM loadcenters and panelboards, simplifying replacement, upgrades, and serviceability.
• Versatile for multiple sectors: Suitable for residential service panels, commercial distribution boards, and light industrial electrical feeds where robust overcurrent protection is required.

Technical snapshot

• Thermal-magnetic molded case circuit breaker
• Amperage rating: 400 A
• Voltage rating: 600 V
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection
• Manufacturer: Eaton
• Part number: HLD3400C

Ideal use cases

• Feeding large branch circuits in residential or commercial panels where a single 400 A breaker controls substantial loads.
• Serving main feeders or subpanels within commercial spaces, storage facilities, or light manufacturing environments needing reliable protection against faults.
• Replacing aging or mismatched breakers in OEM loadcenters to maintain coordinated protection and consistent trip characteristics.

Installation & compatibility

For best performance, pair the Eaton HLD3400C with the corresponding OEM loadcenter or panelboard designed for molded-case breakers. Before installation, verify that the panel’s rating supports a 400 A, 3-pole device and that wiring terminations meet the breaker’s torque and conductor-size requirements. The thermal-magnetic trip provides predictable responses across a range of fault currents, helping protect downstream equipment and reduce downtime due to electrical faults.

What problems this solves

• Prevents damage from overcurrent and short circuits in large branch circuits, reducing the risk of fire and equipment failure.
• Maximizes space efficiency in panel installations, freeing up room for future expansion or additional circuits.
• Offers a reliable, standardized protection solution that aligns with OEM panel architectures for streamlined maintenance and compatibility.

Why choose Eaton HLD3400C

If you need a robust, three-pole solution capable of handling substantial current while fitting neatly into compatible panelboards, the HLD3400C delivers. Its combination of compact design, dependable thermal-magnetic protection, and OEM alignment makes it a practical choice for electricians managing residential, commercial, and light industrial electrical distributions. Trust in a breaker built to protect your panels, feeds, and connected equipment with consistent performance under real-world conditions.