MD3400W | Circuit Breaker | 400A | 3-Pole | 600V

Meet the MD3400W Circuit Breaker — a purpose-built, industrial-grade protective device engineered for reliability in demanding environments. With a 400A rating, 3-pole configuration, and 600V operating capability, this breaker is purposefully designed for maintenance, retrofit, and replacement projects where exact specifications matter and downtime isn’t an option.

Specifications at a glance

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V
• Reference: MD3400W

Why choose the MD3400W for your workflow

When your goal is to restore or upgrade an industrial distribution path without surprises, the MD3400W delivers. It’s purpose-built to slot into systems that require a precise 400A, three-pole, 600V protection device. Its industrial-grade construction helps safeguard critical equipment and personnel, while its exact specifications reduce compatibility risk during retrofits and replacements.

Ideal use cases

• Maintenance and lifecycle replacement in manufacturing lines, processing plants, and commercial fleets with 400A, 3-Pole, 600V circuits
• Retrofit projects where upgrading panel protection demands exact spec matching to existing bus, terminals, and trip pathways
• Replacement of failed or aging breakers in legacy systems that rely on a 3-pole, 600V protective device

How to verify compatibility and install safely

To ensure a smooth replacement or retrofit, always confirm fit and ratings before ordering. The part number MD3400W should be your primary reference for compatibility. Before installation, verify:

• Panel and enclosure listings confirm 400A, 3-Pole, 600V protection is supported
• Bus bar connections, conductor sizes, and mounting pattern align with the existing setup
• Electrical codes and safety procedures are followed, including lockout/tagout and proper torque specifications from the equipment manufacturer

Practical notes for operators and technicians

This MD3400W is more than a drop-in part — it’s a deliberate choice that aligns with your system’s protection strategy. By choosing the exact MD3400W reference, you minimize guesswork, reduce installation risk, and maintain consistent protection across your electrical distribution. Keep the manufacturer’s guidelines handy, and document the replacement with the same level of care you apply to other critical safety components.