Square D QOB2901021 - 90 A, 2-Pole Bolt-On Circuit Breaker | AmpState

Square D QOB2901021 is a 90A, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built by Square D for tough service, this unit offers a rigid, vibration-resistant connection and a precise thermal-magnetic protection profile that stays consistent across loads and temperatures.

Why this breaker works for your panel

• Secure bolt-on mounting provides a rigid, vibration-resistant connection to the bus, helping maintain reliable electrical contact even in spaces with movement or vibration.
• Thermal-magnetic trip unit delivers stable, repeatable protection against overcurrent and short circuits, reducing nuisance trips and safeguarding connected equipment.
• 90A, 2-pole design is ideal for protecting heavier branch circuits or as a feeder protection solution in 120/240V systems.
• OEM-compatible with matching Square D load centers and panelboards, ensuring a clean fit and reliable performance without compatibility surprises.
• Durable molded-case construction suited for residential, commercial, and light industrial applications where reliability matters.

Technical snapshot

• Manufacturer: Square D
• Part number: QOB2901021
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 90 A
• Poles: 2
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal for electricians, facility managers, and homeowners upgrading service panels or adding subpanels in garages, workshops, or light commercial spaces, the QOB2901021 fits seamlessly into compatible Square D panelboards, delivering dependable protection with straightforward installation.

Pro tip: Pair this breaker with matching Square D components to ensure optimal thermal performance and consistent trip characteristics across your panel. Always confirm panel compatibility with the QOB-series breakers to maintain safe, compliant operation.

Ready to secure your circuits with trusted Square D protection? Add the QOB2901021 to your cart and experience dependable, predictable performance in demanding environments.