Square D QGL32125 - 125 A, 240 V, 3-Pole Circuit Breaker | AmpState

Meet the Square D QGL32125 — a 125 A, 240 V, 3-pole molded case circuit breaker designed to deliver reliable branch circuit protection in panelboards and loadcenters. Built to withstand the demands of everyday electrical systems, this unit combines a compact footprint with a precise thermal-magnetic trip mechanism for dependable protection in a variety of settings.

Key benefits

• Space-efficient design — a compact molded case footprint that helps maximize panel space without compromising protection.
• Thermal-magnetic trip unit — provides stable, repeatable protection against overloads and short circuits, reducing nuisance trips and improving reliability.
• OEM compatibility — designed to pair with matching Square D loadcenters and panelboards for a seamless fit and consistent performance.
• 3-pole, 125 A, 240 V configuration — ideal for 3-phase circuits and residential, commercial, and light industrial applications requiring solid, coordinated protection.

Technical specifications

• Manufacturer: Square D
• Part Number: QGL32125
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 125 A
• Voltage Rating: 240 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Ideal applications and use cases

Designed for residential, commercial, and light industrial environments, the QGL32125 fits panelboards and loadcenters that require robust protection for 3-phase systems. Use it to shield feeders and branch circuits in service upgrades, new installations, or panel refurbishments where reliable tripping behavior and OEM compatibility matter most. The compact form factor helps you pack protection into tighter spaces without sacrificing performance.

Installation and compatibility

Choose the QGL32125 when your panelboard or loadcenter specifies a Square D thermal-magnetic molded case breaker in a 3-pole, 125 A, 240 V configuration. Its design is optimized to align with matching OEM components, ensuring proper fit, predictable trip characteristics, and straightforward replacement in supported systems. Always follow electrical codes and manufacturer installation instructions for safe, compliant setup.

Whether you’re upgrading an aging panel, wiring a new project, or stocking spare parts for service calls, the Square D QGL32125 delivers dependable protection with a space-conscious design and OEM-grade reliability.