Square D | QBA221101 | Circuit Breaker | 110A | 2-Pole | 240V | 10kA | Plug-In

Square D QBA221101 circuit breaker delivers dependable protection for residential, commercial, or industrial panels that use plug-in QBA-style breakers. This 110A, 2-pole, 240V unit offers a robust 10kA interrupting rating, making it a reliable choice for maintenance, retrofit, and replacement projects where exact specifications matter.

Designed for quick, tool-free installation in compatible Square D panels, the QBA221101 simplifies panel work by swapping in without rewiring. To ensure a perfect fit, rely on the part number as the best compatibility reference and confirm the device’s ratings before ordering.

Key specifications

• Amperage: 110 A
• Poles: 2-Pole
• Voltage: 240 V
• Interrupting rating: 10 kA
• Configuration: Plug-In
• Part number: QBA221101

Why this breaker stands out

With a 10,000-ampere interrupting capacity, this plug-in breaker is engineered to rapidly interrupt faults on 240-volt circuits, helping protect both wiring and connected equipment. Its 110A rating is ideal for circuits that require higher continuous load protection while maintaining compatibility with Square D panel boards designed for QBA-series devices. This isn’t a universal retrofit part: it’s a purpose-built replacement that aligns with Square D’s engineering standards and labeling requirements.

Ideal use cases

• Maintenance—swap-in replacements in existing Square D panels that accept QBA-style breakers.
• Retrofits—upgrade electrical protection in systems that require a 110A, 2-pole, 240V solution.
• Repairs—quickly restore protective functionality on circuits with worn or failed breakers without extensive wiring work.

Practical tips for a smooth purchase and install

Before ordering, confirm fit and ratings to avoid compatibility issues. Use the part number QBA221101 as the primary reference when verifying panel compatibility, and verify that the panel is designed to accept plug-in QBA breakers. Following these steps helps ensure a seamless replacement that maintains proper protection and code compliance.