Square D QO3405239 - Circuit Breaker

Meet the Square D QO3405239 Circuit Breaker—a trusted safeguard engineered for reliability in demanding electrical systems. Built to protect both people and equipment, this breaker delivers dependable overcurrent protection where it matters most.

Designed for seamless integration, the QO3405239 fits into panelboards, switchboards, control panels, and OEM equipment, making it a versatile choice for a range of applications. Whether you’re upgrading a distribution panel, equipping a motor control center, or provisioning protective devices for a commercial or industrial control system, this breaker is ready to perform under pressure.

• : Provides reliable overcurrent protection to help prevent damage from faults and short circuits in critical systems.
• Wide compatibility across key assemblies: Suitable for panelboards, switchboards, control panels, and OEM equipment, ensuring consistent protection in diverse installations.
• Industrial and commercial suitability: Ideal for industrial facilities, commercial buildings, and OEM projects where safe operation and uptime are essential in distribution panels and motor control centers.
• Dependable performance with familiar integration: Part of the Square D QO family, offering a familiar form factor and straightforward replacement within existing protection schemes.
• Maintenance-conscious design: Built for longevity in real-world environments, helping reduce downtime and maintenance headaches.

This breaker is a practical choice for professionals who value consistent protection, easy installation, and compatibility with existing Square D components. It’s particularly well-suited for maintenance engineers, facility managers, OEM integrators, and electrical contractors responsible for safeguarding distribution panels, motor control centers, and control panels in industrial, commercial, and OEM settings.

Why choose the Square D QO3405239 over generic protection options? It pairs a proven brand with a purpose-built design for demanding electrical systems, delivering dependable operation in critical protection roles. Its form, compatibility, and reliability help ensure your protection strategy remains straightforward and effective across a variety of installations.

Invest in a trusted protection solution that aligns with your electrical design and maintenance needs. The Square D QO3405239 Circuit Breaker is ready to safeguard essential assets and keep systems running smoothly.