Square D PGL36120U43A Circuit Breaker, 1200A, 3-Pole, 600V

The Square D PGL36120U43A circuit breaker is engineered for industrial electrical service, maintenance, and replacement projects. With a 1200 A rating, a 3-pole design, and a 600 V operating range, it delivers dependable protection for large three-phase feeders in demanding environments.

Why this breaker stands out:

• Three-pole protection supports complete three-phase circuits, ensuring balanced interruption across all phases for reliable system protection.
• High-current capability rated for up to 1200 A, making it suitable for heavy-duty feeders and major equipment loads without compromising safety.
• 600 V compatibility ideal for industrial power distribution, motors, conveyors, and other high-power applications common in manufacturing and processing facilities.
• Part-number driven compatibility use the exact part number PGL36120U43A to verify fit with your panel, bus configuration, and application requirements—minimizing the risk of improper sizing.
• Trusted brand lineage Square D components are chosen by professionals for durability and consistent performance in mission-critical environments.

Use cases and practical applications

Perfect for facilities with large motors or high-load feeders, the Square D PGL36120U43A serves as a main disconnect in service panels or as a protective feeder breaker for upstream equipment. It’s a reliable choice for:

• Industrial manufacturing lines requiring dependable three-phase protection
• Maintenance and replacement projects where part-number compatibility is crucial
• New installations in 600 V distribution schemes that demand robust, scalable protection for future load growth

How to ensure a correct fit

Before purchasing, verify fit by part number and application requirements. This ensures seamless integration with your existing panel, bus configurations, and the specific three-phase system you’re protecting.

Need help matching a part number or confirming compatibility? Message us and we’ll help.

In short, the Square D PGL36120U43A circuit breaker offers a concrete, industry-grade solution for high-current, three-phase protection in 600 V systems. Its 1200 A rating and 3-pole design provide precise, reliable safeguarding for critical industrial circuits, making it a solid choice for serious power protection and downtime reduction.