Square D QO220SWN1021 20A 2-Pole 120 V Circuit Breaker

Meet the Square D QO220SWN1021 20A 2-Pole 120V Circuit Breaker—a UL-listed safety device built to protect your wiring and devices in Square D QO panels. This 20-amp breaker (Part Number QO220SWN1021) delivers reliable overcurrent protection, giving you confidence that faults won’t overheat conductors or damage costly appliances.

Engineered for the QO family, this two-pole breaker interrupts both hot legs simultaneously, ensuring safe handling of 240V loads and supporting multi-wire branch circuits where applicable. With a 120V rating, it covers a broad range of residential and light commercial applications, providing consistent performance when it matters most.

• Current rating: 20 A
• Poles: 2
• Voltage rating: 120 V
• Part number: QO220SWN1021
• Brand: Square D
• Series: QO (Square D QO family) for seamless panel compatibility
• Protection type: dependable thermal-magnetic interruption for quick fault clearance

Why this matters: replacing a failed breaker with the correct QO series unit ensures proper protection and easier maintenance. The two-pole design is essential for safely protecting circuits that span two hot legs, reducing the risk of dangerous imbalances and electrical fires.

Ideal use scenarios

• Replacing a worn or tripped breaker in Square D QO panels in homes or light businesses.
• Supporting 240V-capable loads that require a 20A, two-pole protection device.
• Upgrading older electrical panels to a recognized, code-compliant Square D solution for consistent performance.

Practical tips

• Turn off power at the main panel before replacing a breaker and verify the circuit is de-energized.
• Keep the part number QO220SWN1021 on hand for future replacements and warranty considerations.
• Consult local electrical codes and, when in doubt, work with a licensed electrician to ensure correct sizing and safe installation.