Square D PGL36120U31 A - 1200 A, 600 V, 3-Pole Circuit Breaker | AmpState

Introducing the Square D PGL36120U31A 1200A, 600V, 3-pole molded case circuit breaker — a purpose-built solution for reliable branch circuit protection in panelboards and load centers. Designed to handle demanding electrical environments, this unit delivers precise overcurrent and short-circuit protection when you need it most.

• Space-efficient molded case design optimizes panel footprint, helping you fit more protection without compromising accessibility or reliability.
• Thermal-magnetic trip unit provides stable, repeatable protection performance across varying loads and ambient conditions, reducing nuisance trips while guarding against dangerous faults.
• 3-pole configuration for dependable 3-phase protection, ideal for modern commercial and light industrial circuits.
• 600V rating supports safe operation across a wide range of panelboard and loadcenter voltages used in many commercial and industrial installations.
• 1200A amperage rating delivers robust protection for high-load circuits, making it suitable for larger feeders and critical branch circuits.
• OEM compatibility designed to pair with matching Square D OEM load centers and panelboards, ensuring a seamless, code-compliant install with existing equipment.
• Versatile applications appropriate for residential, commercial, and light industrial settings where dependable protection is essential.

Why this breaker stands out in crowded panels or retrofit projects is its combination of high current capability, compact form, and precise protection behavior. The thermal-magnetic trip mechanism reacts quickly to short circuits while coordinating with normal overcurrent loads, helping protect wiring, devices, and downstream equipment from damage and unnecessary downtime.

Use cases and scenarios:

• Upgrading or replacing protection in large residential service panels or multi‑load centers where space is at a premium.
• Feeder protection for commercial electrical rooms with heavy electrical demand and 3‑phase circuits.
• Retrofits in light industrial facilities that require robust, code-compliant 3‑pole protection for critical equipment.

Technical snapshot:

• Manufacturer: Square D
• Part Number: PGL36120U31A
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 1200A
• Voltage Rating: 600V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Whether you’re building out a new panel configuration, upgrading a legacy installation, or replacing a failed breaker, the Square D PGL36120U31A delivers reliable protection with a design that respects space and installation practicality. Pair it with compatible Square D panelboards to maintain system integrity, simplify maintenance, and keep critical circuits protected with confidence.