Square D QOB320 20A 3P 240V Circuit Breaker, Bolt-On | AmpState

The Square D QOB320 Bolt-On 20A 3P 240V circuit breaker is engineered to deliver targeted overcurrent protection for panelboards, load centers, and electrical distribution systems. This unit stands out in replacement projects and as a BOM-aligned spare, helping you keep the original part numbers intact during maintenance or upgrades.

• Bolt-On mounting enables quick, secure installation in compatible Square D panels, minimizing downtime during service or upgrades.
• Three-pole, 20A, 240V configuration supports multi-wire branch circuits and standard 240V feeders in commercial and light-industrial environments.
• BOM-aligned spare keeps inventory consistent with the original part number, simplifying procurement and documentation.
• Trusted brand Square D is a long-standing standard for reliable electrical protection components, available from AmpState.
• Versatile application suitable for replacement in panelboards, load centers, and broader electrical distribution networks, as well as retrofit or new installations requiring a 3P 240V breaker.

Technical snapshot

• Manufacturer: Square D
• Part Number: QOB320
• Product Type: Circuit Breaker
• Amperage: 20 A
• Poles: 3
• Voltage: 240V
• Mounting: Bolt-On

How this breaker adds value

• Reduces downtime by providing a ready-to-install replacement that matches the original specifications.
• Supports precise inventory control with BOM fidelity, making maintenance planning more predictable.
• Shop confidently with AmpState, with support available to confirm fit and compatibility for your panel or distribution setup.

Need help confirming fit? Message us and we’ll help you verify compatibility and ensure this QOB320 is the right match for your panelboard or load center.