Square D QOB320 - 20A, Miniature Circuit Breaker (MCB)

Square D QOB320 is a dependable 20A miniature circuit breaker (MCB) designed to safeguard electrical systems from overcurrent and fault conditions. With a precise 20A current rating and the Miniature Circuit Breaker (MCB) type, this device delivers reliable protection you can count on in demanding environments.

Built for versatility, the QOB320 is suitable for installation in panelboards, switchboards, control panels, and OEM equipment. Whether you’re building a new distribution setup or upgrading an existing enclosure, this MCB fits the needs of modern electrical infrastructure and helps keep circuits protected where it matters most.

• Current rating: 20A — provides targeted overcurrent protection for circuits up to this limit.
• Breaker type: Miniature Circuit Breaker (MCB) — resettable protection that eliminates the need for fuses in many applications.
• Intended applications: panelboards, switchboards, control panels, and OEM equipment — ideal for a wide range of industrial, commercial, and OEM setups.
• Protection scope: supports dependable operation in distribution panels and motor control centers, helping maintain system safety and continuity.

Why choose the Square D QOB320 20A MCB? It offers straightforward installation, quick re-energizing after a trip, and a proven track record from a trusted name in electrical protection. By delivering precise current interruption and reliable reset capability, this MCB minimizes downtime and reduces maintenance headaches in routine panel upkeep.

Ideal for systems where dependable overcurrent protection is essential—from compact control panels to larger distribution assemblies—the QOB320 balances compact practicality with robust performance. If you’re designing or maintaining industrial, commercial, or OEM electrical systems, this 20A MCB from Square D provides a focused, durable solution that keeps your circuits safe and your operations running smoothly.