Eaton E2K3400TMJ Circuit Breaker, 400A, 3-Pole, 600V

The Eaton E2K3400TMJ circuit breaker is built for demanding industrial electrical service, maintenance, and replacement projects. As part of the trusted E2 series, this 3-pole unit delivers robust three-phase protection at a 600 V rating, making it a dependable cornerstone for larger panels and switchgear in manufacturing, processing plants, and heavy industry environments.

Designed to fit standardized Eaton footprints, the E2K3400TMJ helps you simplify upgrades and replacements without surprising compatibility issues. Use the part number to confirm fit for your application and ensure seamless integration with your existing distribution scheme.

• Amperage: 400 A — suitable for protecting feeders and large-scale equipment in industrial settings.
• Poles: 3-pole configuration — ideal for typical three-phase systems found in industrial power controls.
• Voltage: 600 V — appropriate for mid- to high-voltage industrial distribution networks and motor circuits.
• Series: E2 family — standardized design and mounting for reliable, repeatable installation across compatible panels.
• Part number: E2K3400TMJ — verify fit by part number and application requirements to ensure proper mounting and electrical protection.

Who this is for: maintenance teams, facilities engineers, and panel installers seeking a proven, industry-grade circuit breaker for three-phase systems that demand consistent performance and straightforward sourcing. The E2K3400TMJ is especially well-suited for replacing aging units or upgrading service capacity in manufacturing lines, processing equipment, and large commercial facilities.

What problem it solves: reliable interruption protection for high-load, three-phase circuits, reducing the risk of equipment damage and downtime due to overloads or faults. By sticking with the Eaton E2 series, you gain predictable trip characteristics and a familiar installation footprint that minimizes guesswork during replacement or upgrades.

Practical tips for use:

• Always verify compatibility by the exact part number (E2K3400TMJ) against your panel or switchgear documentation before ordering.
• Plan replacements during scheduled maintenance windows to minimize impact on production lines.
• Keep the part on hand as a ready-to-install replacement for critical 3-phase feeders to reduce downtime during service events.

If you’re unsure about compatibility or need help confirming the correct part number for your application, send us a message. We’re ready to help you verify fit and ensure your installation delivers reliable protection for your three-phase electrical system.