Square D JLL36250U31X - 250 A, 3-Pole Circuit Breaker | AmpState

Meet the Square D JLL36250U31X—a 250 A, 3-pole molded-case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for real-world electrical distributions, this unit integrates seamlessly with matching OEM Square D panels to ensure aligned protection and reliable performance where it matters most.

Why this breaker stands out

• Compact molded-case design optimizes space inside panel enclosures, helping you fit essential protection without crowding the panel interior.
• Thermal-magnetic trip unit provides stable, repeatable protection across temperature fluctuations and varying load conditions, reducing nuisance trips while preserving safety.
• OEM-compatible engineered to work with matching Square D load centers and panelboards for precise fit, proper trip coordination, and straightforward installation.
• Versatility across sectors suitable for residential, commercial, and light industrial applications, including main feeders and branch protection in mid-size distributions.

Technical specifications at a glance

• Manufacturer: Square D
• Part number: JLL36250U31X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 250 A
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection in panelboards and load centers

Who benefits from this breaker

Electrical professionals—contractors, facilities managers, and systems integrators—who design or upgrade distribution systems in commercial or light-industrial settings will appreciate the precise fit and reliable protection this unit provides. If your panel requires a robust 3-pole, 250 A solution that coordinates with Square D panels, this breaker is a purpose-built option.

Use cases and practical applications

• Main distribution protection in 3-phase commercial panelboards and load centers.
• Replacement for compatible Square D panels where a 250 A, 3-pole device is specified.
• Feeder protection for moderate electrical equipment banks in light industrial environments.
• Situations where space-saving, molded-case protection helps maximize enclosure capacity without sacrificing safety margins.

Installation and compatibility tips

To ensure optimal performance, pair the JLL36250U31X with matching Square D OEM panelboards or load centers designed for this model. Confirm panel ampacity and phasing requirements align with your distribution design, and follow standard electrical practices for mounting, torqueing terminal connections, and enclosure bonding. This is a purpose-built component for Square D systems, so cross-compatibility with non-Square D panels may require careful coordination checks.

Maintenance and long-term reliability

Rely on the rugged, molded-case construction to withstand routine electrical disturbances in busy enclosures. Regular visual inspections for signs of overheating, proper alignment, and secure terminations will help sustain consistent protection performance. When replacements are needed, referencing the exact part number JLL36250U31X ensures you maintain the intended trip characteristics and coordination within your Square D system.

Available through AmpState, the Square D JLL36250U31X delivers a precise, space-efficient, and dependable protection solution for your 250 A, 3-pole distribution needs.