Eaton HLD3350 - 350 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton HLD3350 is a rugged 350A, 600V, 3-pole molded case circuit breaker designed to safeguard branch circuits within panelboards and loadcenters. Built for dependable protection, this unit helps ensure reliable power distribution in demanding residential, commercial, and light industrial environments.

• Compact molded-case design optimizes panel space, making it easier to fit higher protection in tighter electrical rooms or compact enclosure footprints.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining overload (thermal) sensing with instantaneous short-circuit interruption (magnetic), reducing nuisance trips and protecting downstream equipment.
• 3-pole configuration provides balanced protection for three-phase systems, coordinating effectively with three-phase panelboards and loadcenters.
• 350A, 600V rating aligns with higher-load circuits and industrial-style applications while maintaining compatibility with standard distribution gear.
• OEM-matching compatibility designed to pair with Eaton’s own loadcenters and panelboards for straightforward, reliable replacement or upgrade installs.
• Versatile application suitable for residential, commercial, and light industrial settings where robust branch-circuit protection is essential.

Why this breaker stands out

Unlike generic protectors, the HLD3350 is built to integrate seamlessly with Eaton’s ecosystem of panelboards, ensuring coordinated protection and predictable trip behavior. The thermal-magnetic mechanism translates to precise protection curves under varying load conditions, helping to minimize downtime and extend the life of connected equipment.

Ideal use scenarios

• Upgrading or replacing protection in existing panelboards where three-phase distribution is used.
• New installations in commercial spaces with higher power demands and compact panel layouts.
• Light industrial electrical rooms needing reliable, three-pole overcurrent and short-circuit protection.

Compatibility and installation notes

Pair the Eaton HLD3350 with matching OEM loadcenters and panelboards for optimal performance. Verify that the panelboard is rated for 600V and supports a 3-pole, 350A molded case breaker of this frame. Follow standard electrical practices and local codes when installing or upgrading distribution equipment.

Technical snapshot

Manufacturer: Eaton

Part Number: HLD3350

Type: Thermal-magnetic molded case circuit breaker

Amperage Rating: 350A

Voltage Rating: 600V

Number of Poles: 3

Application: Branch circuit overcurrent and short-circuit protection

With the Eaton HLD3350, you get trusted three-phase protection that fits neatly into your panelboard ecosystem, delivering dependable performance when it matters most—keeping circuits safe and equipment operating smoothly.