Eaton | HLDB3300 | Circuit Breaker | 300A | 3-Pole | 600V

Meet the Eaton HLDB3300 circuit breaker — a purpose-built solution for maintaining and upgrading three-phase electrical systems. With a 300 Amp rating, 3-pole configuration, and a 600V maximum, this breaker is designed for reliable protection in commercial and industrial panels where exact compatibility matters. When you need a precise replacement or retrofit, the HLDB3300 is the go-to choice that aligns with Eaton’s engineering standards and panel compatibility expectations.

Key specifications

• Amperage: 300 A
• Poles: 3-Pole (three-phase)
• Voltage rating: 600 V
• Part number: HLDB3300

Why this model stands out for maintenance, retrofit, and replacement

When service time matters, you want a breaker that aligns precisely with your existing equipment. The HLDB3300 is identified by its part number, ensuring you’re selecting a unit that fits the same panel geometry, bus connections, and mounting profile as your current setup. This minimizes downtime, reduces the risk of non-fit issues, and keeps protective coordination consistent across your electrical system.

Who should consider the HLDB3300

• Facilities managers and maintenance teams performing panel refurbishments or back-up replacements in commercial buildings, factories, and data centers.
• Electrical engineers and specifiers upgrading service capacity or replacing aging protection devices in three-phase 600V environments.
• Contractors seeking a reliable, OEM-referenced component that matches Eaton-compatible panels and accessories.

Practical guidance for selecting and using

Important: confirm fit and ratings before ordering. The best reference for compatibility is the part number HLDB3300, so cross-check this with your panel labeling and documentation. For a smooth installation, mirror your existing breaker’s mounting method and bus connection type, and plan for proper torque and secure mounting following your panel’s guidelines. If you’re upgrading to higher-rated protection in a 600V system, ensure downstream devices and wiring are sized accordingly to maintain safe, coordinated protection.

Use-case scenarios

• Replacing a failed or obsolete 3-pole 300A, 600V protection device in an industrial control panel.
• Retrofitting legacy systems to restore updated protection without changing panel enclosures.
• Expanding capacity in a three-phase service where a like-for-like, OEM-referenced breaker is required for ongoing reliability.

Choose the Eaton HLDB3300 for a direct, compatible replacement that preserves protection coordination, minimizes installation risk, and supports efficient maintenance cycles in demanding 600V three-phase environments.