Square D QMB-364 - 200A, 600V, Switch

The Square D QMB-364 is a rugged 200A, 600V fusible switch designed to deliver dependable on/off isolation and robust overcurrent protection in demanding industrial and commercial environments. This compact, maintainable disconnect switch streamlines installation and service, providing a reliable safety gateway for power distribution where space and reliability matter most.

Key features

• Model: QMB-364 — a proven Square D solution built for industrial reliability
• Amperage: 200A and voltage rating of 600V for demanding electrical loads
• Compact, maintainable fusible switch designed for straightforward field servicing and replacement
• Provides clear on/off control and effective isolation to protect personnel and equipment
• Ideal as a motor disconnect, panelboard protection point, or branch-circuit protective device

Ideal applications

• Motor disconnects in manufacturing lines, HVAC systems, and heavy equipment installations
• Panelboards requiring a compact, integrated disconnect and protection solution
• Branch circuits needing reliable isolation and overcurrent protection in constrained spaces
• Retrofit projects where preserving footprint while upgrading protection is essential

Why this matters

The QMB-364 combines isolation and protection in a single, durable package, reducing the number of separate components in a control system and simplifying maintenance. Its robust construction is designed to withstand the rigors of busy electrical environments, delivering consistent performance when every second counts. With a 200A, 600V rating, it seamlessly handles sizable loads while providing clear, decisive disconnection during maintenance or emergency situations.

Specifications at a glance

• Model: QMB-364
• Amperage: 200A
• Voltage: 600V
• Type: Fusible switch for reliable isolation and overcurrent protection

Practical tips for installation and use

• Plan for accessible control access and ensure adequate clearance around the device for safe operation.
• Coordinate with upstream and downstream protective devices to maintain coordinated protection across the circuit.
• Regularly inspect the switch mechanism and mounting hardware as part of routine electrical maintenance.
• Use the QMB-364 in applications where a compact, maintainable solution can simplify wiring and serviceability without sacrificing protection.