Eaton HLD3300X - 300 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Eaton HLD3300X—a 300 A, 600 V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers.

Engineered for environments where vibration and demanding electrical loads are a fact of life, this breaker features secure bolt-on mounting that creates a rigid, vibration-resistant bus connection. The thermal-magnetic trip unit provides stable, repeatable protection—the thermal element reacts to sustained overcurrents, while the magnetic element delivers immediate isolation during short circuits. This combination helps protect wiring and equipment while minimizing nuisance trips in normal operating conditions.

Key features

• Secure bolt-on mounting ensures a rigid, vibration-resistant bus connection that stays tight through equipment operation and mechanical vibration.
• Thermal-magnetic trip unit delivers precise, dependable protection with fast response to short circuits and reliable coordination with other devices.
• 3-pole configuration supports standard 3-phase distribution up to 600 V, ideal for commercial and light industrial panels.
• 300 A amperage rating provides robust branch-circuit protection for heavy-load circuits.
• OEM compatibility designed to integrate seamlessly with matching Eaton load centers and panelboards for easier upgrades and maintenance.
• Molded case construction built for durability in service rooms, electrical closets, and distribution environments.

Ideal applications

Perfect for residential, commercial, and light industrial electrical distributions where reliable overcurrent and short-circuit protection is essential. Use in new installations or retrofit projects to maintain code-compliant protection for 3-phase branch circuits up to 600 V.

Why this matters

Choosing a bolt-on breaker with a secure mounting and a thermal-magnetic trip unit translates to fewer maintenance concerns, tighter electrical coordination, and better long-term reliability in panelboards and load centers. The Eaton HLD3300X is built to work as part of an Eaton ecosystem, simplifying installation, service, and future expansions.

Specs at a glance

• Manufacturer: Eaton
• Part number: HLD3300X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 300 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Bolt-on
• Applications: Branch circuit overcurrent and short-circuit protection