Eaton LA3400PR - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Eaton LA3400PR is a high-capacity, 3-pole bolt-on molded case circuit breaker engineered to safeguard your most demanding electrical runs. With a 400A rating and a 600V maximum, it delivers dependable branch circuit protection for panelboards and loadcenters in residential, commercial, and light industrial environments. Built for rugged performance, this unit prioritizes a solid connection and precise protection when it matters most.

• Secure bolt-on mounting: design focused on a rigid, vibration-resistant bus connection that stays put even in busy panels, reducing movement-related wear and intermittent trips.
• Thermal-magnetic trip unit: combines temperature-based protection with instant magnetic trip for fast responses to short circuits, delivering repeatable protection across varying loads and conditions.
• 3-pole configuration: ideal for 3-phase circuits, feeders, and motor loads, helping you coordinate protection across all phases in a single, compact device.
• High-capacity, durable construction: molded case design that stands up to routine panel maintenance and the rigors of commercial and light-industrial deployments.
• OEM-compatible compatibility: designed to pair with matching Eaton OEM loadcenters and panelboards to ensure proper fitment, electrical coordination, and streamlined replacement when upgrading or expanding your system.
• Residential to light industrial versatility: a versatile choice for service entrances, subpanels, or branch circuits requiring reliable overcurrent and short-circuit protection.

What problems does the LA3400PR solve? It provides a robust, maintenance-friendly solution for protecting heavy-duty circuits where space is at a premium and reliability is non-negotiable. By combining a secure bolt-on mount with a precise thermal-magnetic trip, it minimizes nuisance trips while delivering fast protection during faults. This results in safer electrical systems, fewer field adjustments, and longer panel life.

Usage scenarios include upgrading panelboards in small commercial spaces, protecting large motor feeds in light industrial setups, or enabling safe, retained-protection expansion in multi-panel installations. If you’re replacing an aging bolt-on breaker or engineering a new, scalable panel layout, the LA3400PR offers a fit-and-forget performance profile—with the peace of mind that comes from Eaton’s respected protection technology.

Technical snapshot: 400A, 600V, 3-pole, bolt-on, thermal-magnetic molded case circuit breaker. Part of Eaton’s trusted protection lineup, designed for dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters.