Square D JJL36150 - 150 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Square D JJL36150—a dependable, three-pole molded case circuit breaker designed to deliver precise branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Rated at 150A and 600V, this breaker is built to keep commercial, light industrial, and select residential installations running smoothly, safely, and on a clean electrical curve.

• Compact molded-case design minimizes footprint while maximizing usable panel space, making it ideal for tight electrical closets and crowded load centers.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining long-term thermal sensing with fast magnetic response for immediate short-circuit interruption.
• 3-pole configuration ensures balanced protection across all hot legs in 3-phase systems, helping prevent phase-to-phase faults and ensuring coordinated shutdown when needed.
• OEM-compatible designed to be used with matching Square D OEM loadcenters and panelboards for reliable fit and dependable operation.
• Versatile you-need-it-now protection suitable for residential, commercial, and light industrial applications where robust, predictable circuit protection is a must.

Key specifications at a glance

• Manufacturer: Square D
• Part number: JJL36150
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 150A
• Voltage rating: 600V
• Number of poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Why choose this breaker? It’s designed to pair seamlessly with Square D panels, delivering predictable tripping behavior and reliable performance across a wide range of operating conditions. The compact form factor helps you maximize space inside panelboards and loadcenters, while the thermal-magnetic trip unit delivers consistent protection even as ambient temperatures shift or loads fluctuate.

Who benefits most

• Electrical contractors installing or upgrading panelboards in commercial spaces, light industrial facilities, or large residential campuses
• Maintenance technicians replacing aging or faulty breakers in existing Square D installations
• Panel builders and system integrators needing dependable, OEM-compatible protection for 3-phase distribution

Practical scenarios include upgrading service panels to support higher loads, protecting feeders in small-to-medium commercial rooms, or configuring new 3-phase equipment rooms where compact, reliable MCCB protection is essential. By choosing the Square D JJL36150, you’re investing in a proven solution that aligns with standard Square D loadcenters and delivers consistent, safe protection when it matters most.