Eaton LDC3400 - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton LDC3400 is a high-capacity, 3-pole molded case circuit breaker engineered to protect panelboards and loadcenters with precision. Rated at 400A and 600V, this device delivers dependable branch circuit overcurrent and short-circuit protection for a wide range of electrical installations.

Why the LDC3400 stands out

• Space-efficient, compact molded case design optimizes panel layout, letting you fit high-current protection without sacrificing valuable enclosure space.
• Thermal-magnetic trip unit provides stable, repeatable protection performance, ensuring predictable response to both overloads and sudden faults.
• OEM-compatible—designed to be used with matching OEM loadcenters and panelboards for straightforward, reliable integration.
• 3-pole configuration ideal for three-phase circuits, enabling coordinated protection across all conductors in commercial and light industrial applications.

Ideal applications

With its 400A, 600V rating and 3-pole design, the Eaton LDC3400 is well-suited for residential service panels, commercial office spaces, and light industrial electrical systems. It’s a robust choice for feeders, motor circuits, and branch protections where space and reliability matter.

Technical specifications at a glance

• Manufacturer: Eaton
• Part Number: LDC3400
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 400A
• Voltage Rating: 600V
• Number of Poles: 3
• Applications: Branch circuit overcurrent and short-circuit protection

Practical tips for deployment

To maximize performance and longevity, pair the LDC3400 with compatible loads and panelboards designed for its thermal-magnetic protection characteristics. Confirm panel compatibility with Eaton’s OEM lineup to ensure seamless installation and reliable coordination with upstream protective devices. This breaker is a concrete solution for high-current feeders and three-phase circuits where space constraints are a consideration.

Who benefits most

Electricians and facilities managers seeking a rugged, space-saving solution for medium to high-current protection will appreciate the Eaton LDC3400. It’s particularly well-suited for retrofit projects in existing panelboards or new installations in commercial and light industrial environments where dependable protection and compact form factor matter.

In short, the Eaton LDC3400 delivers powerful three-phase protection in a compact package, engineered to integrate smoothly with matching loadcenters and panelboards while providing predictable, reliable performance for demanding electrical systems.