Square D QO120 20A 1-Pole Circuit Breaker: 10kA Interrupt, Thermal Magnetic Trip for Reliable Protection
Ensure the safety and reliability of your electrical system with the Square D QO120 miniature circuit breaker. This 1-pole, 20-amp breaker is engineered for 120/240 VAC applications, providing robust protection for residential and light commercial branch circuits. Its core feature is a 10,000-ampere (10 kA) interrupting rating, allowing it to safely halt dangerous fault currents, preventing damage to wiring and connected equipment. The thermal-magnetic trip mechanism offers precise, dual-stage protection: the thermal element responds to sustained overloads, while the magnetic element reacts instantly to short-circuit events. This ensures optimal coordination and minimizes nuisance tripping. Part of the renowned Square D QO series, this breaker is designed for easy installation in compatible QO load centers, featuring a visible trip indicator that provides a clear, quick visual alert when the circuit is off. Its compact design is ideal for panel spaces where efficiency is key. Common use cases include dedicated protection for kitchen appliance circuits, bathroom outlets, garage workshops, lighting circuits, and other general-purpose 120V branch circuits requiring a 20-amp rating. By choosing a Square D QO breaker, you invest in a legacy of proven performance, durability, and safety trusted by electricians for decades. This circuit breaker is a fundamental component for system upgrades, new construction, or replacing old breakers, delivering peace of mind through superior electrical protection for your home or business.
