Square D PGL36025U31 A - 250 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D PGL36025U31A, a rugged three-pole molded‑case circuit breaker designed for dependable branch circuit overcurrent and short‑circuit protection in panelboards and load centers. With a 250A rating and a 600V maximum, this plug‑in unit is built to withstand the demands of commercial and light industrial environments while delivering reliable protection for your three‑phase feeders and downstream circuits.

• Fast plug‑in connection: installs quickly into compatible panelboards and load centers, minimizing downtime during upgrades, replacements, or new builds.
• Thermal‑magnetic trip for stable protection: combines thermal overload sensing with magnetic short‑circuit action to deliver repeatable, predictable performance even as ambient conditions change.
• OEM‑compatible for seamless integration: designed to snap into matching Square D panelboards and load centers, helping maintain system integrity and ease of maintenance.
• Versatile for multiple markets: suitable for residential projects, commercial installations, and light industrial applications where robust 3‑pole protection is essential.

Technical specifications

• Manufacturer: Square D
• Part number: PGL36025U31A
• Type: Thermal‑magnetic molded case circuit breaker
• Amperage rating: 250A
• Voltage rating: 600V
• Number of poles: 3
• Mounting style: Plug‑in
• Application: Branch circuit overcurrent and short‑circuit protection

Why this breaker is a smart choice

When you’re building or upgrading a panel, reliability matters as much as speed. The PGL36025U31A’s plug‑in design reduces installation time and simplifies future maintenance, so you can swap breakers without lengthy disconnections or specialized tools. The dual‑element trip system provides precise protection: the thermal element responds to sustained overloads to prevent nuisance trips, while the magnetic element delivers a decisive response to dangerous short circuits—helping protect downstream equipment, wiring, and utility life across the panel.

Ideal use scenarios

• Upgrading older feed breakers in commercial or light industrial panels to accommodate higher‑demand equipment with a single, reliable 250A three‑pole solution.
• Replacing failed or obsolete plug‑in breakers in Square D panels to restore fast, factory‑matched protection without panel reconfiguration.
• Feeding 3‑phase equipment racks or large motors where a robust 250A, 600V protection method is required.

Practical tips and insights

• Before installation, confirm that your panelboard is rated for 600V and is compatible with Square D plug‑in breakers to ensure proper fit and performance.
• Label the protected circuit clearly after installation to facilitate future maintenance and safety checks.
• If frequent trips occur, investigate upstream faults or load imbalances before replacing the breaker; the thermal‑magnetic design helps distinguish temporary overloads from persistent faults.
• Use as part of a coordinated protection scheme with correctly rated conductors and overcurrent devices to maintain electrical system integrity.

The Square D PGL36025U31A is a purpose‑built, plug‑in solution that combines rapid installation with dependable, repeatable protection for critical 3‑phase circuits. Whether you’re modernizing a commercial panel, equipping a light industrial distribution, or performing a planned panel upgrade, this 250A, 3‑pole breaker delivers the performance and durability you expect from Square D.