Eaton Cutler-Hammer 3TA401K 400A 3P 600V Circuit Breaker | AmpState

Meet the Eaton Cutler-Hammer 3TA401K—a robust 400 A, 3-pole, 600 V circuit breaker designed to deliver reliable protection for panelboards, load centers, and broader electrical distribution systems. This unit is built to handle demanding three-phase circuits, ensuring consistent performance in commercial and industrial environments.

Why this exact part matters: for maintenance teams, panel builders, and spare inventories, a direct part-number match matters. The 3TA401K ensures seamless compatibility with your existing Eaton distribution equipment, reducing installation guesswork and minimizing downtime during maintenance or replacements.

• Exact part-number match with Eaton Cutler-Hammer 3TA401K for straightforward cross-reference and reliable field performance.
• 400 A, 3 poles, 600 V specification provides strong protection for large feeders and three-phase circuits in demanding setups.
• Ideal applications: panelboards, load centers, and electrical distribution networks where dependable, type-appropriate protection is essential.
• Inventory efficiency: keep this unit in spare stock to shorten service times and avoid substitutions that could affect system behavior.
• Support when you need it: AmpState can assist in confirming fit and compatibility to ensure a precise match for your installation.

Beyond the specs, this breaker offers practical advantages: quick replacement in mission-critical panels, predictable performance under load, and a trusted lineage from Eaton’s Cutler-Hammer line. When you choose the 3TA401K, you’re selecting a component designed to protect your investment—minimizing nuisance trips and safeguarding downstream equipment in routine and peak-demand operations.

Use cases to consider include new panel builds requiring a correctly rated main protection device, facility maintenance programs prioritizing exact cross-reference parts, and industrial control or distribution center projects where reliable three-phase protection is non-negotiable. If you’re upgrading or expanding, this 3TA401K from AmpState offers a precise fit within the Eaton ecosystem, delivering peace of mind and dependable circuit protection for years to come.