Square D QMB326W - 600A, 240V, 3-Pole, Switch

The Square D QMB326W is a robust 3-pole fusible switch designed to deliver dependable on/off isolation and reliable overcurrent protection in demanding industrial and commercial settings. With a 600A rating at 240V, this switch provides a compact, maintainable solution for motor disconnects, panelboards, and branch circuit protection where space and serviceability matter.

• High-current protection in a compact form: 600A at 240V in a 3-pole configuration, delivering balanced protection across all phases while fitting into tight electrical layouts.
• Integrated isolation with precise protection: Serves as both a controlled disconnect and a protective device, helping reduce fault impact and simplify safety procedures on busy work sites.
• Space-saving design for critical installations: Engineered to occupy a smaller footprint than larger switchgear without sacrificing reliability, making it ideal for crowded electrical rooms and limited-clearance panelboards.
• Maintenance-friendly for busy facilities: Built for straightforward servicing and quick access to connections, helping minimize downtime during routine checks or fuse replacements.
• Versatile applications: Perfect for motor disconnects, panelboard protection, and branch circuit protection—where a compact, durable fusible switch is required to keep operations flowing smoothly.

Why operators choose the QMB326W

In environments where continuous equipment protection and rapid isolation are non-negotiable, the QMB326W delivers a clear, tangible advantage. Its rugged design handles the demanding demands of manufacturing floors, processing lines, and large HVAC or pumping systems, while its 3-pole arrangement ensures synchronized protection across all conductors. The result is fewer unplanned outages, clearer fault conditions, and a safer, more reliable electrical system.

Specifications at a glance

• QMB326W
• Amperage: 600A
• Voltage: 240V
• Poles: 3-Pole

Choose the Square D QMB326W when you need a compact, maintainable fusible switch that reliably performs isolation and protection duties across motor loads and critical circuits. It’s a practical, space-efficient solution built to stand up to the rigors of industrial and commercial use, helping you protect equipment, improve safety, and keep downtime to a minimum.