Square D JRA36150 - 150 A, 3-Pole Plug-In Circuit Breaker | AmpState

Square D JRA36150 is a 150A, 3-pole plug-in molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built to integrate seamlessly with matching OEM components, this breaker helps keep electrical systems safe while simplifying maintenance and upgrades.

• Fast plug-in connection enables quick installation and effortless replacement in existing panels, reducing downtime during service or upfits.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining precise thermal overload sensing with a magnetic instantaneous trip for rapid fault clearance.
• 3-pole design supports three-phase circuits and aligns with common commercial and light industrial panel configurations.
• 150A amperage rating handles high-load feeders while maintaining robust protection for downstream equipment.
• OEM-compatible with matching Square D OEM load centers and panelboards, ensuring a secure fit, consistent electrical characteristics, and straightforward retrofits.
• Versatile applications suited for residential, commercial, and light industrial installations requiring reliable branch-circuit protection.

Technical specifications

• Manufacturer: Square D
• Part Number: JRA36150
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 150A
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Why this breaker stands out

The Square D JRA36150 isn’t just another breaker—it’s designed to integrate with Square D panel systems for dependable protection where it matters most. The plug-in design speeds up installations and replacements, while the thermal-magnetic trip curve provides predictable response across a range of fault conditions. With OEM compatibility, you gain a secure fit, consistent electrical characteristics, and straightforward retrofits in existing panelboards and load centers.

Ideal use scenarios

• Upgrading or expanding commercial electrical subpanels and load centers that require reliable 3-pole protection for three-phase feeders
• Protecting large-draw equipment in light industrial setups, including HVAC, pumps, and conveyors
• Residential building service panels in multi-meter installations where three-phase protection is required

For installation, ensure the panelboard is rated for plug-in molded case circuit breakers of the JRA series and that wiring, compatibility, and enclosure ratings align with Square D guidelines. Regular inspection of trip performance and replacement with identical part numbers maintains system safety and performance.