Eaton HLD3300C - 300 A, 600 V, 3-Pole Circuit Breaker | AmpState

Introducing the Eaton HLD3300C—a rugged 3-pole molded case circuit breaker engineered for dependable branch circuit protection in panelboards and loadcenters. With a 300 A rating and 600 V capability, this unit is built to handle demanding residential, commercial, and light industrial environments while maintaining precise protection against overcurrent and short-circuit events.

Why the HLD3300C stands out

• Compact molded-case design optimizes panel space without compromising protection, making it a smart fit for tighter electrical distribution layouts.
• Thermal-magnetic trip unit delivers stable, repeatable protection across normal load fluctuations and fault conditions, helping to prevent nuisance trips and protect downstream equipment.
• 3-pole configuration ideal for 3-phase systems, enabling coordinated protection in commercial and light industrial panelboards and loadcenters.
• OEM-loadcenter compatibility designed to pair with matching Eaton panelboards and loadcenters, ensuring consistent performance and streamlined installation.

Who should consider the HLD3300C?

This breaker is a strong choice for electrical professionals and facilities managers who need reliable, high-current protection in spaces where panel real estate matters. It’s particularly well-suited for installations that require seamless integration into Eaton’s ecosystem—from residential service panels to commercial distribution enclosures and light-industrial feeders.

Practical use cases

• Protecting large branch circuits in residential subpanels where space is at a premium.
• Supplying and safeguarding mid-to-large loads in commercial distribution panels.
• Providing robust short-circuit protection for feeders in light industrial equipment setups.

Key specifications at a glance

• Manufacturer: Eaton
• Part Number: HLD3300C
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 300 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Installation and best practices

To maximize protection performance, pair the HLD3300C with compatible Eaton panelboards or loadcenters. Ensure electrical connections follow manufacturer torque specifications and local codes. The thermal-magnetic trip unit provides predictable trip behavior, helping coordinate protection across multiple devices in the same distribution system. For ongoing reliability, inspect the breaker during scheduled maintenance cycles and replace only with the same part number to maintain intended trip characteristics.

In short, the Eaton HLD3300C is a purpose-built solution for high-current protection that respects panel real estate, aligns with Eaton’s OEM ecosystem, and delivers dependable performance across residential, commercial, and light industrial applications.