Square D QOB120K 20A 1-Pole 240 V Circuit Breaker Potential Transformer

Meet the Square D QOB120K 20A 1-Pole 240V Circuit Breaker — a trusted protection device designed to safeguard your 240-volt circuits with dependable performance. Built for reliability, this part integrates seamlessly into Square D panels and supports safe operation in demanding electrical environments. The designation “Potential Transformer” in the product lineage hints at its role within protection schemes that monitor and control volta ge levels, helping you maintain stable, protected electrical systems.

Where this breaker shines

• Protects a single 240V circuit with a 20-amp capacity, shutting off power when current exceeds safe limits to prevent overheating and electrical fires.
• One-pole design is ideal for dedicated 240V loads within compatible Square D panels, offering straightforward installation and clear circuit separation.
• Part Number QOB120K identifies a precise, compatible replacement option for applications requiring a 1-pole, 240V 20A protection device in the Square D family.
• Suitable for use in residential or light commercial electrical setups where 240V circuits power critical equipment and appliances.

What makes it practical in real-world use

• Simple protection for high-demand 240V equipment such as large appliances, HVAC components, and other single-circuit loads that rely on a robust 20A breaker.
• Clear electrical separation inside panels helps technicians diagnose and maintain circuits more efficiently, reducing downtime during servicing or upgrades.
• Durable construction and a familiar Square D footprint provide dependable performance over time, aligning with standard electrical practice and safety expectations.

Compact, purpose-built, and easy to specify, the Square D QOB120K 20A 1-Pole 240V Circuit Breaker delivers precise overload protection for dedicated 240V circuits. When you’re upgrading panels, restoring a legacy setup, or stocking replacements for critical loads, this part gives you a straightforward, reliable option that aligns with Square D’s established reliability and compatibility standards.