Square D QOB3110VH - 110 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Square D QOB3110VH is a 110 A, 240 V, 3-pole bolt-on molded case circuit breaker engineered for reliable branch circuit protection in panelboards and load centers. Designed to endure demanding environments, this unit delivers steadfast overcurrent and short-circuit protection where it matters most—from home electrical upgrades to light commercial installations.

Key features that set this breaker apart

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection for long-term performance in panels and enclosures.
• Thermal-magnetic trip unit delivers stable, repeatable protection, responding promptly to overloads and short circuits to safeguard wiring and devices.
• OEM-compatible design is crafted to fit with matching Square D load centers and panelboards, ensuring dependable integration and electrical balance.
• Versatile application suitable for residential, commercial, and light industrial circuits that require robust 3-pole 240 V protection.

Technical snapshot

• Manufacturer: Square D
• Part number: QOB3110VH
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 110 A
• Voltage rating: 240 V
• Number of poles: 3
• Mounting style: Bolt-on
• Primary use: Branch circuit overcurrent and short-circuit protection

Why this breaker matters for your electrical system

When you need dependable protection for 240 V circuits, the QOB3110VH combines mechanical robustness with precise trip behavior. The bolt-on design minimizes connection loosening in vibration-prone installations, so you can count on consistent performance in equipment rooms, service panels, and subpanels. The thermal-magnetic trip unit shields conductors and devices from damage by clearing faults quickly and predictably, reducing nuisance trips while maintaining safety margins for motor loads and lighting circuits.

Ideal use scenarios

• Upgrading or replacing breakers in Square D panelboards and load centers that require a 3-pole, 110 A protection device.
• Residential electrical panels where 240 V distribution serves multi-wire branch circuits or 3-phase equipment in light commercial settings.
• Subpanels in small offices, retail spaces, or workshops with motors, compressors, or HVAC equipment that need reliable short-circuit protection.

Practical considerations for installation and care

• Ensure the panelboard is designed for bolt-on breakers of this type and that mounting hardware is tightened to the manufacturer’s specifications to maintain a solid bus connection.
• Verify system voltage and load requirements align with the 240 V, 3-pole configuration to prevent mismatches and ensure full protection coverage.
• Use as part of a comprehensive protection strategy that includes properly rated conductors, enclosure grounding, and surge considerations for sensitive equipment.

With the Square D QOB3110VH, you’re choosing a purpose-built, bolt-on solution that prioritizes secure electrical connections, precise protection, and compatibility with trusted Square D panel systems. It’s a thoughtful choice for delivering reliable 110 A, 240 V, 3-pole protection in modern residential and light commercial electrical layouts.