Square D QOB2110 - 110 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D QOB2110, a 2-pole bolt-on molded case circuit breaker built for reliable branch circuit protection in panelboards and load centers. With a 110 A rating and 240 V operation, this unit delivers strong, consistent protection for demanding residential, commercial, and light industrial circuits.

Why the QOB2110 stands out

• Secure bolt-on mounting creates a rigid, vibration-resistant bus connection that helps maintain consistent electrical contact over time.
• Thermal-magnetic trip unit provides stable, repeatable protection, responding quickly to overcurrents and short circuits while minimizing nuisance trips.
• 2-pole design protects both conductors in 240 V circuits, ensuring complete disconnection when protection is required.
• OEM-compatible designed to pair with matching Square D OEM load centers and panelboards for a seamless, dependable fit.
• Versatile for multiple sectors ideal for residential distribution, commercial subpanels, and light industrial panel applications.

Technical essentials at a glance

• Manufacturer: Square D
• Part Number: QOB2110
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 110 A
• Voltage rating: 240 V
• Poles: 2
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Use the QOB2110 to protect feeders and individual branch circuits in panelboards and load centers that require robust 240 V, 2-pole protection. It’s well-suited for:

• Residential distribution panels serving kitchens, HVAC, and high-draw appliances
• Commercial subpanels powering lighting, outlets, and small-mupply infrastructure
• Light industrial panels handling fault protection for equipment and machinery circuits

Installation and compatibility tips

• Ensure your panelboard or load center is designed to accept Square D QOB-series breakers for an optimal fit and performance.
• Mount using the bolt-on method as specified by OEM guidelines to achieve the best mechanical stability and bus contact.
• Follow the manufacturer’s installation instructions for torque and wiring practices to maintain safe, reliable protection.

Whether you’re upgrading an old panel, configuring a new distribution board, or stocking spare parts for service calls, the Square D QOB2110 delivers dependable, precise protection where it matters most. Order today from AmpState and equip your electrical system with a proven, OEM-compatible solution that stands up to everyday demands.