Square D QMB-323-MW - 100A, Disconnect Switch

The Square D QMB-323-MW 100A Disconnect Switch is a purpose-built solution for reliable on/off isolation and overcurrent protection in demanding industrial and commercial settings. Designed as a compact, maintainable fusible switch, it delivers decisive control where protecting motors, panelboards, and branch circuits matters most.

Key benefits that set this disconnect switch apart

• 100A capacity—built to handle motor loads and circuit protection where robust switching is essential.
• Compact, maintainable design—a streamlined form factor that simplifies installation, wiring, and serviceability in tight electrical spaces.
• Reliable isolation and protection—ensures a safe disconnect every time while providing dependable overcurrent protection for downstream equipment.
• Versatile application—an ideal choice for motor disconnects, panelboards, and branch circuit protection in both new installations and upgrades.

What problems does it solve?

When machines need a dependable, easily serviceable means to isolate power, the QMB-323-MW delivers. It reduces downtime by providing quick, decisive disconnection for maintenance or troubleshooting, while safeguarding wiring and components from overload. For facilities that demand consistent performance in busy electrical rooms, this disconnect switch offers the trusted Square D reliability you rely on.

Ideal use cases

• Motor disconnects in manufacturing equipment, fans, pumps, conveyors, and other heavy loads.
• Primary or secondary protection in panelboards and consolidated switchgear areas.
• Branch circuit protection where a compact, easy-to-service fusible switch is preferred.

Why choose the Square D QMB-323-MW

• Renowned Square D engineering that prioritizes safety, longevity, and consistent performance in harsh environments.
• A focused design that blends compact footprint with straightforward maintenance, helping you maximize usable space in electrical racks.
• A clear, practical solution for installers and maintenance teams seeking durable isolation and protection without unnecessary complexity.

Product specifications

• Model: QMB-323-MW
• Amperage: 100A

Upgrade your power-distribution strategy with the Square D QMB-323-MW 100A Disconnect Switch—a dependable, targeted solution for isolating and protecting critical equipment in industrial and commercial environments.