Square D PJL36120 - 1200 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Square D PJL36120 is a high-capacity, three-pole molded case circuit breaker engineered to safeguard distribution panels in demanding environments. Rated at 1200 A and 600 V, this device delivers reliable branch circuit overcurrent and short-circuit protection within panelboards and load centers, helping keep industrial and commercial systems running smoothly.

• Powerful, 3-pole design supports 3-phase circuits, making it ideal for larger commercial and light industrial applications.
• Compact molded case minimizes panel footprint while preserving essential protection features, enabling efficient use of space in crowded electrical panels.
• Thermal-magnetic trip unit provides stable overload protection with fast magnetic response for short-circuit events, delivering repeatable protection performance across typical installation environments.
• OEM-compatible designed to pair with matching Square D load centers and panelboards, ensuring straightforward integration and dependable system compatibility.
• Versatile application suitable for residential, commercial, and light industrial installations requiring robust, high-current circuit protection.

Key use cases

• Main protection for large commercial panelboards and sub-panels in industrial settings
• Feeder protection for 3-phase distribution in light industrial facilities
• Retrofit or expansion into compatible Square D OEM load centers to upgrade capacity or replace aging breakers

Technical snapshot

• Manufacturer: Square D
• Part number: PJL36120
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 1200 A
• Voltage rating: 600 V
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Whether you’re upgrading a panel, expanding capacity, or replacing an aging breaker in a heavy-duty distribution system, the PJL36120 from Square D delivers dependable protection where it matters most. Trustworthy, compatible, and purpose-built for high-current environments, it’s a practical choice for ensuring your electrical infrastructure remains protected and compliant.

Pro tips: pair this breaker with a matching Square D load center to streamline installation, verify panel compatibility before replacement, and schedule periodic professional inspections to ensure secure mounting and proper electrical connections.