Eaton Cutler-Hammer LT3400T 400A 3P 600V Circuit Breaker | AmpState

Meet the Eaton Cutler-Hammer LT3400T 400A 3P 600V Circuit Breaker — a purpose-built solution for reliable circuit protection in panelboards, load centers, and electrical distribution networks. Crafted for everyday electrical work, this unit is designed to stand up to retrofit projects and routine maintenance where keeping the exact part number matters for stocking and compatibility.

Key specifications at a glance

• Manufacturer: Eaton Cutler-Hammer
• Part Number: LT3400T
• Type: Circuit Breaker
• Amperage: 400 A
• Poles: 3 (three-pole)
• Voltage rating: 600 V
• Applications: Panelboards, load centers, and electrical distribution systems

Why this LT3400T stands out

Residential or industrial electrical systems depend on precise protection from faults and overloads. The LT3400T is purpose-built to deliver dependable protection in 3-phase configurations up to 600V, with a robust 400A capacity that accommodates substantial modern loads while maintaining clear, actionable protection behavior. Its three-pole design is ideal for balanced three-phase systems, helping prevent imbalances that can stress equipment and wiring.

Ideal use cases

• When installations require the exact LT3400T part number to match existing gear, this unit ensures seamless compatibility without reconfiguring bus layouts or protection schemes.
• For facilities that rely on consistent part numbers in service inventories, the LT3400T simplifies ordering, stock management, and replacement workflows.
• Suitable for panelboards and load centers that serve commercial or industrial loads, keeping protection aligned with 3-phase electrical distribution up to 600V.
• When expanding or upgrading to higher-current distribution paths, this 400A breaker provides a clear upgrade path within standard Eaton Cutler-Hammer configurations.

Practical considerations and compatibility

Designed to integrate with standard electrical distribution equipment, the LT3400T is compatible with panelboard and load center architectures that support 3P, 400A protection at 600V. If you’re unsure about fit, AmpState offers assistance in matching part numbers and confirming compatibility to keep your project on track and your downtime to a minimum.

Why choose AmpState for this breaker

AmpState carries the LT3400T, providing access to genuine Eaton Cutler-Hammer components. By choosing this source, you benefit from direct availability and straightforward support for part identification and compatibility questions, helping you complete installations or replacements with confidence.

Quick guidance for installation and best practices

• Verify system voltage and three-phase configuration before installation to ensure the 600V rating and 3-pole design match your distribution setup.
• When retrofitting, confirm that the LT3400T’s physical dimensions and bus connection points align with existing panelboard or load center infrastructure to prevent clearance or contact issues.
• Plan for maintenance cycles by documenting the exact part number (LT3400T) in your asset registry to simplify future replacements and reorders.

For engineers, electricians, and facility managers seeking dependable circuit protection with a clear path for retrofit and maintenance, the Eaton Cutler-Hammer LT3400T 400A 3P 600V Circuit Breaker delivers the right mix of capacity, three-phase protection, and compatibility. If you need help confirming fit or identifying the correct part for your specific panel, reach out to AmpState for expert guidance and fast, accurate support.