Square D QMJ364T - 200A, 600V, Disconnect Switch

Meet the Square D QMJ364T—a robust 200 A, 600 V disconnect switch engineered for reliable on/off isolation and dependable overcurrent protection in demanding industrial and commercial environments. Built as a compact, maintainable fusible switch, it provides a safe, code-conscious solution for motor disconnects, panelboards, and branch circuit protection where space and serviceability matter.

Key Advantages

• High-capacity protection: 200 A rating ready to handle demanding motors and feeders without compromising safety.
• Wide voltage compatibility: Suitable for systems up to 600 V, offering flexible integration across industrial controls and distribution layouts.
• Fusible switch design: Integrated protection with straightforward fuse replacement, enabling quick maintenance and clear isolation when service is required.
• Compact, maintainable form: A space-efficient footprint that fits neatly in panels and enclosures, with accessible components to simplify routine servicing.
• Versatile application: Ideal for motor disconnects, panelboard feeders, and branch circuit protection in both new installations and upgrades.

Ideal Use Cases

• Motor control centers and drive systems where reliable isolation is essential for safe startup and maintenance.
• Panelboards and feeders that require a dedicated disconnect with integrated protection.
• Facilities upgrading electrical distribution to meet stricter safety and maintenance standards.
• Environments that demand a compact solution without sacrificing protection or serviceability.

Technical Specifications

• Model: QMJ364T
• Amperage: 200 A
• Voltage: 600 V
• Type: Fusible disconnect switch (provides on/off isolation with integral protection)

Installation & Maintenance Tips

To maximize uptime and safety, plan for routine inspections of the disconnect and its fuse elements, keep spare fuses on hand for quick service, and ensure installation remains compliant with local electrical codes. Use the QMJ364T in conjunction with compatible enclosures and support structures to preserve enclosure integrity and ease future maintenance. Regularly verify that the switch is fully engaged or fully disengaged during operation checks to prevent unexpected power interruptions.