Square D | Q221100AB | Circuit Breaker | 100A | 2-Pole | 240V

Meet the Square D Q221100AB 100A 2-Pole 240V Circuit Breaker—a purpose-built protection device designed to safeguard your 240-volt circuits while fitting seamlessly into compatible Square D panels. Ideal for maintenance, retrofit, and replacement projects where exact specifications matter, this breaker keeps your electrical system reliable with minimal downtime.

Key specifications

• Amperage: 100 A
• Poles: 2-Pole
• Voltage: 240 V

Why choose this model

The two-pole design ensures both hot legs disconnect together on a 240V circuit, enhancing safety and reducing the risk of arc or isolation issues during a fault. With its 100A rating, it can protect feeders and branch circuits that require higher capacity without sacrificing protection or trip reliability.

Using the Q221100AB part number as the compatibility reference gives you confidence in fit across compatible panels. When ordering, always confirm the exact panel model and rating to ensure a seamless replacement or retrofit.

Ideal use cases

Perfect for replacing worn breakers in service panels, upgrading a circuit to support higher loads, or retrofitting existing electrical systems where 240V, 100A protection is required. This breaker is suited to both residential and light commercial applications where dependable, code-aligned protection is essential.

Practical guidance

Before purchasing, verify that your panel accepts Square D breakers and that the Q221100AB’s 100A, 2-pole, 240V configuration matches your circuit. Store a spare in case of routine maintenance, and document the replacement for future service calls.