Square D QO220 20 Amp 2-Pole Circuit Breaker 120/240VAC QO Load Center

Square D QO220 20 Amp 2-Pole Circuit Breaker 120/240VAC QO Load Center

The Square D QO220 is a 20-amp, 2-pole plug-in miniature circuit breaker from Square D's long-running QO series, rated for 120/240VAC residential and light commercial panel applications. It is designed to snap directly into Square D QO load centers and provides thermal-magnetic overcurrent protection for 240-volt double-pole branch circuits.

Specifications & What's Included

• Brand: Square D (Schneider Electric)
• Model: QO220
• Secondary Reference: MJ4628
• Amperage: 20 A
• Number of Poles: 2
• Voltage Rating: 120/240VAC
• Interrupting Rating: 10,000 AIC
• Series: QO
• Mounting: Plug-in (QO load center compatible)
• Trip Mechanism: Thermal-magnetic
• Toggle: Single-handle, ON/OFF markings visible on front face
• Terminals: Dual rear wire lugs (visible in rear photo)
• Includes: Circuit breaker only — no panel, wiring, or accessories

Applications

The Square D QO series is one of the most widely installed residential circuit breaker lines in North America, compatible with the extensive range of Square D QO load centers found in homes and light commercial buildings. A 2-pole 20-amp breaker like the QO220 is used to protect 240-volt branch circuits such as dryers, air conditioners, water heaters, and similar double-pole loads. The QO series has been produced since the 1950s, and QO breakers remain a current, actively manufactured product line — making used surplus examples a practical and cost-effective replacement or spare for panel maintenance and renovation work. Electricians, contractors, and facilities maintenance teams commonly source surplus QO breakers for service upgrades, panel replacements, and repair jobs.