Square D | LEL36400LS | Circuit Breaker | 3-Pole | 480V

Meet the Square D LEL36400LS 3-Pole Circuit Breaker, built for reliable protection in demanding 480V, three‑phase systems. Designed for maintenance, retrofit, and replacement projects, this breaker delivers precise compatibility when you need to restore safe, uninterrupted power to critical equipment.

Key Details

• Part number: LEL36400LS
• Poles: 3-Pole
• Voltage rating: 480V
• Applications: maintenance, retrofit, replacement
• Compatibility note: Confirm fit and ratings before ordering; the part number is the best reference for compatibility.

Why this 3-Pole breaker matters for 480V systems

In a 3-phase environment, a 3-pole breaker like the LEL36400LS provides balanced protection across all conductors, helping prevent uneven loading and potential motor or equipment damage. By synchronizing trip characteristics across all phases, it minimizes the risk of nuisance trips and ensures a coordinated shutdown during faults. This model is engineered to meet Square D standards for dependable performance in industrial panels and switchgear.

Ideal use cases

• Upgrading or replacing aging breakers in 480V, three-phase distribution panels
• Retrofit projects where exact Square D compatibility is required
• Maintenance replacements to maintain panel reliability and safety
• Panel rebuilds or controlled system upgrades in manufacturing, facilities, and process plants

Compatibility, installation, and practical tips

Before you order, verify that your enclosure and panel model align with the LEL36400LS specifications. Because the part number is the most reliable reference for compatibility, use it as the primary check against your equipment’s documentation. Ensure the voltage rating matches your 480V system and that the breaker’s trip characteristics align with your protection strategy. If you’re replacing an original Square D component, confirm mounting style and termination type to guarantee a clean, secure fit in your panel.

Practical tips for a smooth swap:

• Power down the circuit and discharge stored energy before handling the breaker.
• Inspect panel branding and enclosures to confirm they accommodate a 3-pole, 480V device.
• Match the new breaker’s electrical ratings with the system load to avoid mismatches and trips.
• Keep documentation handy: the LEL36400LS part number remains the strongest reference for replacement and retrofits.

Why choose Square D for this application

Square D is known for robust industrial protective devices that are designed to withstand harsh environments and provide predictable performance. The LEL36400LS carries that legacy, offering dependable protection for 3‑phase 480V circuits with a focus on compatibility, safety, and long-term serviceability in commercial and industrial settings.