Square D LRA36250U31X - 250 A, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D LRA36250U31X, a 250 A, 3-pole plug-in molded‑case circuit breaker built for reliable, immediate protection in panelboards and loadcenters. Designed for fast swaps and dependable performance, this breaker is a precise fit for dedicated branch circuits that demand robust overcurrent and short‑circuit protection.

Why this breaker stands out

• Fast plug-in connection for quick installation and effortless replacement, minimizing downtime during panel maintenance or upgrades.
• Thermal-magnetic trip unit delivers stable, repeatable protection against overloads and short circuits, helping to prevent nuisance trips and equipment damage.
• OEM-compatible design ensures seamless compatibility with matching Square D loadcenters and panelboards, reducing fitment issues during retrofits or new builds.
• 3-pole, 250 A configuration ideal for 3‑phase or multi-pole configurations in commercial and light industrial settings, while still suitable for residential panels that require a higher-capacity protection device.
• Versatile applications engineered for residential, commercial, and light industrial environments where dependable branch circuit protection is critical.

Technical snapshot

• Manufacturer: Square D
• Part Number: LRA36250U31X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 250 A
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Use this plug-in breaker to protect large feeders and critical circuits within panelboards that accept 3-pole, molded-case devices. It’s an excellent choice for upgrading existing Square D installations, enabling quick replacement without compatibility concerns. In commercial subpanels or light industrial mains, the 250 A rating provides a strong balance between protection and practicality, helping to safeguard motors, HVAC equipment, and high‑demand feeders.

Practical guidance

For best results, confirm that your panelboard or loadcenter is designed for plug‑in breakers of this type and rating. Follow local electrical codes and manufacturer installation instructions. If you’re performing an upgrade or retrofit, this model’s OEM compatibility makes it a reliable, straightforward choice that aligns with Square D’s design standards and performance expectations.