Square D QOU240 - 40A, Circuit Breaker

Meet the Square D QOU240 40A circuit breaker—a compact, rugged protection device engineered for reliability in demanding electrical environments. It delivers dependable overcurrent protection by interrupting fault currents, safeguarding your distribution panels and motor control centers from damage and downtime.

Designed for industrial, commercial, and OEM applications, this 40A circuit breaker fits panelboards, switchboards, control panels, and OEM equipment, helping you guard critical loads and keep operations running smoothly.

• 40A current rating provides precise protection for feeders and branch circuits, reducing the risk of damage from overloads or short circuits.
• Versatile compatibility engineered for use in panelboards, switchboards, control panels, and OEM configurations to cover a wide range of power distribution needs.
• Proven reliability from Square D—built for durable performance in industrial environments and mission-critical panels.
• Safe operation in distribution panels and motor control centers to safeguard machinery, processes, and personnel in factory and commercial settings.

Whether you’re commissioning a new system or upgrading an aging protection scheme, the QOU240 provides a dependable, straightforward solution that minimizes downtime and protects assets. It’s ideal for panel builders, equipment manufacturers, and facility engineers who demand consistent protection and predictable behavior under fault conditions.

Key specifications

• Current rating: 40A
• Breaker type: Circuit Breaker

Practical usage notes

• Confirm compatibility with your current panel or OEM equipment before installation to ensure proper fit and electrical characteristics.
• Label circuits clearly and keep spare units on hand to streamline maintenance and replacements in the field.