Square D | LGF36400U31X | Circuit Breaker | 400A | 3-Pole | 600V

Meet Square D LGF36400U31X, a rugged circuit breaker designed to protect high-demand electrical systems. This 400A, 3-pole device is rated for 600V and is tailored for maintenance, retrofit, and replacement projects where exact specifications matter. The LGF36400U31X is identified by its part number, providing a reliable reference to ensure compatibility with your Square D panels or switchgear before you purchase.

• Amperage: 400 A
• Poles: 3-Pole
• Voltage: 600 V
• Usage: Ideal for maintenance, retrofit, and replacement tasks that require precise specification matching
• Compatibility note: Confirm fit and ratings before ordering; the part number LGF36400U31X is your best reference for ensuring a correct match

Why choose this model? When your application demands robust three-phase protection at higher currents, this 400A, 3-pole breaker delivers reliable interruption capability at up to 600V. It’s designed to slot into systems that require the exact LGF-series characteristics, helping you maintain electrical integrity while minimizing downtime during upgrades or repairs.

Ideal use cases include industrial power distribution, large commercial feeders, and retrofit projects where legacy panels require a precise, compatible replacement. This breaker is most effective in setups that rely on Square D’s established reliability for consistent performance over time.

Practical tips for procurement and installation:

• Double-check that the panel or switchgear you’re upgrading expects an LGF-series, 400A, 3-pole, 600V device, using the LGF36400U31X part number as the compatibility reference.
• Use only if the panel labeling confirms the interrupt rating and frame compatibility align with this model.
• During replacement, ensure the main power is de-energized and all safety procedures are followed according to your facility’s electrical standards.