Square D QBL22100 - 100 A, 240 V, 2-Pole Circuit Breaker | AmpState

Meet the Square D QBL22100 100A, 240V, 2-pole molded case circuit breaker — a dependable protector for branch circuits in panelboards and load centers. Designed for busy electrical installations, this unit blends compact form with robust protection, ensuring safe, reliable operation across residential, commercial, and light industrial environments. Available from AmpState, it’s a direct fit for compatible Square D OEM panels, delivering a seamless upgrade path and consistent performance.

What makes it stand out

• Compact molded-case design maximizes panel space so you can fit more circuits without crowding the bus.
• Thermal-magnetic trip unit provides stable overload protection with instantaneous response to short circuits, delivering repeatable trip characteristics across varying temperatures.
• 100A, 240V, 2-pole configuration suits main feeders and multi-wire branch circuits, balancing protection with practical wiring options.
• OEM-compatible with matching Square D loadcenters and panelboards for straightforward replacement and reliable performance.
• Branch circuit protection safeguards wiring, devices, and connected equipment from overcurrent and short-circuit events, reducing risk of damage and fire.

Ideal applications and scenarios

Use this breaker in residential subpanels to feed essential circuits (lighting, outlets, HVAC), in small commercial spaces for lighting and receptacle circuits, or in light industrial panelboards where dependable 100A protection is required. Its two-pole design ensures proper handling of multi-wire branches and shared neutrals when installed in compatible panels.

Why it beats generic alternatives

Beyond a basic overcurrent device, the QBL22100 is engineered to integrate with Square D OEM panels, offering predictable trip curves and ease of maintenance. The compact enclosure reduces panel depth and simplifies panel layout, while the thermal-magnetic trip unit delivers repeatable performance across temperature swings—an advantage when installs span different climates or spaces.

Technical snapshot

Manufacturer: Square D
Part number: QBL22100
Type: Thermal-magnetic molded case circuit breaker
Amperage rating: 100 A
Voltage rating: 240 V
Poles: 2
Applications: Branch circuit overcurrent and short-circuit protection