Square D QOB120VH1021 - 20 A, 1-Pole Bolt-On Circuit Breaker | AmpState

When dependable branch circuit protection matters most, the Square D QOB120VH1021 stands up to the task. This 20A, 1-pole bolt-on molded case circuit breaker is engineered for durability and precise protection in panelboards and load centers, delivering consistent performance across residential, commercial, and light industrial settings.

What sets it apart:

• Secure bolt-on mounting creates a rigid, vibration-resistant bus connection for reliable long-term operation.
• Thermal-magnetic trip unit provides stable, repeatable protection against both overloads and short circuits, helping prevent nuisance trips while safeguarding wiring.
• OEM-compatible design ensures seamless integration with matching Square D load centers and panelboards, reducing installation friction and compatibility concerns.
• Versatile for multiple environments—well suited for residential circuits, commercial feeders, and light industrial applications where dependable protection is essential.

Technical snapshot

• Manufacturer: Square D
• Part Number: QOB120VH1021
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and practical benefits

Ideal for replacing aging or undersized breakers in existing panelboards where a secure, vibration-resistant connection is critical—think finished basements, busy mechanical rooms, or commercial spaces with frequent equipment cycling. The bolt-on design minimizes movement under load, helping maintain a dependable trips-to-protect pairing between the breaker and the bus bar. Its 1-pole configuration makes it a straightforward solution for single-phase branch circuits, delivering targeted protection without unnecessary complexity.

Who should consider this breaker

• Electrical contractors upgrading or repairing panels in homes, offices, and light commercial facilities
• Facility managers prioritizing reliable circuit protection and ease of maintenance
• DIY enthusiasts replacing aging breakers in compatible Square D panelboards (with proper fit and safety precautions)

Choose the Square D QOB120VH1021 for a precise, rugged, and compatible solution that aligns with your panelboard infrastructure while delivering dependable 20A protection for your essential circuits.