Square D QOB380 - 80A, 3-Pole, Miniature Circuit Breaker (MCB)

Meet the Square D QOB380 — an 80A, 3-Pole Miniature Circuit Breaker (MCB) designed to deliver dependable overcurrent protection in demanding electrical environments. Built for reliability, it helps keep distribution panels and motor control centers safe and operational when it matters most.

With a 3-Pole configuration and an 80A current rating, the QOB380 is purposefully suited for three-phase systems common in industrial equipment, commercial power distribution, and OEM applications. Its compact, rugged design streamlines installation in panelboards, switchboards, and control panels, reducing wiring complexity while maintaining robust protection.

• Current rating: 80A — precisely protects feeders and branch circuits in medium-to-heavy load environments.
• Poles: 3-Pole — protects all three phases in a single device, ensuring coordinated shutdown of three-phase circuits.
• Breaker type: Miniature Circuit Breaker (MCB) — provides fast, predictable tripping behavior to minimize downtime and equipment damage.
• Ideal for industrial, commercial, and OEM settings where dependable protection and safe operation in distribution panels and motor control centers are critical.

Practical use cases

• Upgrading or retrofitting three-phase panelboards in manufacturing processes where reliable protection reduces unplanned outages.
• Protection of main feeders and branch circuits in motor control centers and compact switchgear.
• OEM installations requiring a standardized, interchangeable MCB that integrates seamlessly with Square D components.

Why the QOB380 stands out

Unlike generic breakers, the QOB380 is part of the Square D family, offering compatibility with established electrical architectures and predictable performance across installation environments. Its three-pole design consolidates three-phase protection into one compact device, simplifying wiring, inventory, and maintenance. For facilities aiming to harmonize protection across panels and MCCs, the QOB380 provides a reliable, scalable solution that aligns with professional electrical standards.

Technical snapshot

• Current rating: 80A
• Poles: 3-Pole
• Breaker type: Miniature Circuit Breaker (MCB)