Square D QOB240GFI - 40 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet Square D QOB240GFI — a 40A, 240V, 2-pole bolt-on molded case circuit breaker built to protect your electrical system with confidence. Engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers, this breaker combines robust construction with precise, repeatable performance.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays aligned under continuous operation.
• Thermal-magnetic trip unit delivers stable, predictable protection by handling overloads with the thermal element and delivering fast interruption during short circuits with the magnetic element.
• 2-pole, 240V design interrupts both hot legs for safe, balanced protection of 240V circuits.
• 40A rating is well-suited for common branch circuits in residential, commercial, and light industrial settings—think HVAC feeders, water heating, and small motor loads.
• OEM-compatible designed to pair with matching Square D load centers and panelboards, ensuring a seamless fit and reliable performance.
• Durable molded-case construction built for long-term reliability in distribution panels where space is tight and reliability matters.

This breaker excels as a core protection device in residential panelboards, light commercial panels, and small industrial installations. It protects 240V circuits with a dependable, dual-pole interrupt mechanism while maintaining compatibility with your Square D ecosystem for easy upgrades, replacements, or panel servicing.

Specifications

• Manufacturer: Square D
• Part Number: QOB240GFI
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Tip for best results: verify that your panelboard is an OEM Square D load center designed for bolt-on, 2-pole 240V breakers and that the overall amperage and trip characteristics align with your protection needs. This ensures optimal performance, safety, and panel compatibility across your electrical system.