Square D QMB324 - 200A, 240V, 3-Phase, Switch

The Square D QMB324 stands up to demanding industrial and commercial workloads with dependable on/off isolation and robust overcurrent protection. Engineered as a compact, maintainable fusible switch, this 200A, 240V, 3-Phase device is built to keep critical motor circuits and panelboard assemblies safe and accessible—even in busy environments.

Product highlights

• Model: QMB324 — a trusted Square D solution for dependable electrical control
• amperage: 200A for handling sizable motor and branch circuit loads
• Voltage: 240V, three-phase configuration designed for industrial power distribution
• Phase: 3-Phase connections suitable for motor control and panelboard protection
• Functionality: reliable on/off isolation paired with overcurrent protection
• Design: compact, maintainable fusible switch tailored for space-constrained installations
• Ideal for: motor disconnects, panelboards, and branch circuit protection in demanding environments

Why it excels in real-world use

When your operation hinges on quick, safe isolation of heavy loads, the QMB324 delivers. Its rugged construction is purpose-built for industrial floors, manufacturing lines, pumping stations, and commercial facilities where downtime costs money. The integrated overcurrent protection helps safeguard equipment and wiring from faults, while the switch’s compact footprint makes it easier to fit into existing enclosures and electrical rooms without sacrificing performance.

Ideal applications

• Motor disconnects for large fans, pumps, compressors, and conveyors
• Panelboard sections requiring reliable branch circuit protection
• Control panels in manufacturing, processing, and facility infrastructure
• Enclosures where a robust, maintainable protection device is needed without occupying excessive space

Key benefits and outcomes

• Safety and reliability: dependable isolation to enable maintenance without exposing personnel to live circuits
• Protects valuable equipment: overcurrent protection helps prevent damage from overloads and faults
• Operational efficiency: straightforward maintenance and a compact design reduce installation footprint and downtime
• Versatile integration: suitable for motor control and distribution within panelboards and branch circuits

Practical tips for installation and use

• Plan for accessible electrical clearance around the switch to ensure safe operation and servicing
• Pair the QMB324 with compatible enclosures designed for fusible switches to maximize protection and ease of maintenance
• Label circuits clearly to reflect the 200A, 240V, 3-Phase configuration for quick identification during inspections

Technical snapshot

• : QMB324
• : 200A
• : 240V
• : 3-Phase
• : Motor disconnects, panelboards, branch circuit protection
• : Fusible switch — compact and maintainable