Square D | QBA221104 | Circuit Breaker | 110A | 2-Pole | 240V

Meet the Square D QBA221104 circuit breaker—a purpose-built protection device engineered for reliability in maintenance, retrofit, and replacement projects. This 110A, 2-pole, 240V breaker is designed to safeguard high-current 240-volt circuits in compatible Square D panels, helping you prevent damage from overloads while keeping your electrical system compliant with code requirements.

• Amperage: 110 A rating provides strong overcurrent protection for demanding 240V loads, helping to prevent overheating and equipment damage.
• Pole configuration: 2-pole design discontinues both hot legs simultaneously, ensuring a full disconnect for 240V circuits and balanced protection across phases.
• Voltage rating: 240V operation aligns with common residential and light commercial 240V circuits such as large appliances and motor-driven equipment.
• Part number accuracy: The QBA221104 model is the most reliable reference for compatibility with Square D panels. As noted in the product details, confirm fit and ratings before ordering.

Why choose this model over generic substitutes? It’s built specifically for Square D load centers, delivering precise fit, known electrical characteristics, and the UL listings that panel manufacturers require. Whether you’re performing routine maintenance, upgrading an aging panel, or retrofitting to support new high-current appliances, this breaker provides a seamless, confident upgrade path without altering your existing panel architecture.

Practical use cases

• Protecting 240V circuits feeding large appliances such as electric water heaters, room AC units, or electric ranges.
• Replacing a worn or failed breaker in a Square D panel during a retrofit or service restoration.
• Upgrading circuit protection in aging electrical systems where a robust 110A, 2-pole solution is required to handle modernization demands.

Tips for a smooth installation

• Always start by turning off the main power and verifying there is no voltage present in the panel before removing or installing breakers.
• Double-check the panel’s catalog number and bus configuration to ensure exact compatibility with the QBA221104. The part number is your best reference for compatibility.
• Follow local electrical codes and, if you’re unsure about panel compatibility, consult a licensed electrician to perform the upgrade safely.

In summary, the Square D QBA221104 110A, 2-Pole, 240V circuit breaker delivers dependable protection for high-current 240V circuits within Square D panels. Its precise fit, clear reference to compatibility via the part number, and suitability for maintenance, retrofit, and replacement make it a practical, trusted choice for maintaining electrical safety and system reliability.