Square D | LAF36400V | Circuit Breaker | 400A | 3-Pole | 36400V

Power your industrial power distribution with the Square D LAF36400V circuit breaker — a purpose-built, high-capacity protection device designed for demanding 3‑phase systems. With a 400A rating, 3‑pole configuration, and a 36,400V operating capability, this breaker is engineered to safeguard large feeders in tough environments while delivering reliable, consistent protection.

Key specifications

• Amperage: 400A
• Poles: 3‑Pole
• Voltage: 36,400V (36.4 kV)
• Part number: LAF36400V — best reference for compatibility

Designed for maintenance, retrofit, and replacement projects, this LAF36400V unit ensures you’re matching the exact specifications required by your Square D panels. The part number is the most reliable guide for fit and ratings, helping you minimize downtime and compatibility concerns during upgrades or sparking-house repairs.

Why this matters for your system

• High-current protection: 400A capacity handles substantial feeders, reducing the risk of overloads in heavy-load environments.
• Three-pole design: Covers all three phases, providing balanced protection and coordinated trip performance for reliable 3‑phase operation.
• High-voltage capability: Suitable for industrial distribution scenarios up to 36.4 kV, enabling safe control of large-scale networks.
• Clear compatibility reference: The LAF36400V part number is the definitive guide for ensuring the correct fit in compatible Square D installations.

Practical use scenarios

• Maintenance: Replace aging or failed breakers in existing Square D panels that accept LAF series devices, preserving panel integrity and electrical protection standards.
• Retrofit: Upgrade legacy high-capacity feeds to a current, compatible 3‑pole, 400A protection solution without changing the entire panel architecture.
• Replacement: Serve as a direct, drop-in replacement for matched LAF36400V-configured circuits, helping maintain continuity of service with minimal wiring or mounting alterations.

How to verify compatibility and ensure a smooth install

• Always confirm fit and ratings before ordering—the part number is the most reliable compatibility reference.
• Check that your panel or switchgear accepts LAF-series breakers and matches the 3‑pole, 400A, 36.4 kV specification.
• Prepare for installation by verifying mounting, bus bar alignment, and any panel-specific torque or terminal requirements recommended for LAF36400V devices.

In short, the Square D LAF36400V circuit breaker is a decisive choice for professionals maintaining or upgrading high‑voltage, three‑phase distribution. Its precise 400A, 3‑pole, 36.4 kV ratings, combined with a clear compatibility reference, make it the reliable option when exact specifications and dependable protection matter most.