Square D JRA36250U43X - 250 A, 3-Pole Plug-In Circuit Breaker | AmpState

Discover reliability in a compact, factory-rated package with the Square D JRA36250U43X — a 250 A, 3-pole plug-in molded case circuit breaker designed to shield panelboards and load centers from branch-circuit overloads and short circuits. Built for fast, straightforward installation, this unit snaps into compatible OEM enclosures with a secure plug-in connection, making replacements and upgrades quick and clean.

At the heart of its protection strategy is a thermal-magnetic trip unit that delivers stable, repeatable performance across varying load profiles. The thermal element responds to gradual overcurrents, while the magnetic element provides immediate disconnection for high-energy faults, helping prevent damage to wiring, devices, and downstream equipment. You get dependable protection without the guesswork.

Key benefits

• Fast plug-in connection for quick installation and seamless replacement, reducing downtime during service calls or panel upgrades.
• Thermal-magnetic trip for stable, repeatable protection that adapts to changing electrical conditions while delivering rapid fault clearance when needed.
• OEM-compatible with matching Square D load centers and panelboards, ensuring a reliable fit and documented performance in built-out or retrofit projects.
• Versatile across sectors suitable for residential, commercial, and light industrial applications where robust branch-circuit protection is required.
• Three-pole, 250 A design delivers synchronized protection for three-phase systems and feeder circuits.

Ideal use scenarios

• Upgrading or replacing breakers in commercial panelboards and industrial load centers
• Protecting large feeders and three-phase circuits in light industrial settings
• New installations that demand quick, field-friendly plug-in installation with OEM compatibility
• Maintenance and service work where minimizing downtime is critical

Technical snapshot

• Manufacturer: Square D
• Part Number: JRA36250U43X
• 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

Designed for professionals who demand durability and clear, OEM-aligned performance, the JRA36250U43X helps you safeguard electrical systems while simplifying maintenance. Whether you’re refreshing a residential panel, equipping a commercial distribution board, or provisioning a light-industrial setup, this plug-in breaker provides consistent protective behavior, straightforward service, and long-term reliability.