Square D QGA221004 - 100 A, 240 V, 2-Pole Plug-In Circuit Breaker | AmpState

The Square D QGA221004 is a 100-amp, 240-volt, 2-pole plug-in molded case circuit breaker designed to guard branch circuits against overloads and short circuits. Engineered for dependable protection in panelboards and load centers, it's a precise fit for residential, commercial, and light industrial electrical systems.

Fast, tool-free installation: simply plug in the unit for quick replacement or upgrades, minimizing downtime during panel servicing or layout changes.

Thermal-magnetic protection you can rely on: the thermal element reacts to sustained overcurrent, while the magnetic element clamps high‑fault currents with repeatable trip performance, helping you avoid nuisance trips and protect sensitive equipment.

Designed for compatibility: built to match Square D OEM panelboards and load centers, this 2-pole 100A device provides reliable protection for branch circuits powering lighting, outlets, HVAC, and other critical loads.

What you get

• Amperage rating: 100 A
• Voltage rating: 240 V
• Poles: 2
• Type: Thermal-magnetic molded case circuit breaker
• Mounting style: Plug-in
• Manufacturer: Square D
• Part number: QGA221004
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

Upgrade existing panels in homes or light commercial spaces, install in service panels or subpanels, and maintain critical circuits where fast replacement reduces downtime. When you need a reliable 2-pole protection strategy at 100 A, this unit fits your Square D‑based panel ecosystem and helps you stay in code-compliant, element-balanced operation.

Why this model stands out

• Plug-in design minimizes installation time and reduces risk of mis-wiring during swaps.
• Thermal-magnetic trip delivers stable performance across ambient temperatures and load profiles.
• OEM panel compatibility reduces the need for adapters or mismatched fit, ensuring proper bus connection and safe mounting.
• 2-pole design provides simultaneous isolation of both live conductors, improving safety for multi-wire branch circuits.