Square D QMJ364H - 200A, 600V, 3-Pole, Disconnect Switch

The Square D QMJ364H is a purpose-built 3-pole disconnect switch designed to deliver dependable on/off isolation and reliable overcurrent protection in demanding industrial and commercial settings. With a 200A rating and a 600V maximum, this compact, maintainable fusible switch is ready to safeguard motors, panelboards, and branch circuits where space and serviceability matter.

Why this disconnect switch stands out

• Three-pole configuration provides robust, balanced control across all phases, ensuring secure isolation and consistent protection.
• 200 Amp, 600 Volt capability covers common industrial motor loads and branch circuits, reducing the need for over-sized switchgear in many applications.
• Fusible switch design combines isolation with overcurrent protection in a single, maintainable unit—facilitating safer fuse maintenance and straightforward inspections.
• Compact footprint supports installations in tight electrical rooms, control panels, and service enclosures without sacrificing performance.
• Maintenance-friendly construction emphasizes accessible components and straightforward servicing, helping minimize downtime during fuse replacements or routine checks.
• Rugged, industrial-grade build engineered to withstand the demands of commercial and industrial environments while delivering reliable, long-term operation.

Ideal applications

• Motor disconnects where quick, clear isolation is essential for safe maintenance and shutdowns.
• Panelboards requiring a compact, maintainable disconnect with integrated protection.
• Branch circuit protection in systems that demand a reliable, easily serviceable solution in a limited space.

Technical snapshot

• Model: QMJ364H
• Amperage: 200 A
• Voltage: 600 V
• Poles: 3-Pole
• Type: Disconnect switch with fusible protection for on/off isolation and overcurrent control

Practical guidance for deployment

When planning installation, map out the load profiles across all three phases to ensure the 200 A rating aligns with your motor or branch circuit demands. The compact, fusible design makes fuse selection and replacement straightforward, reducing downtime during routine maintenance. Pair the QMJ364H with appropriate enclosures and adherence to your site’s safety and electrical standards to maximize reliability and uptime.