Square D QMB-363-TW - 100A, Disconnect Switch

The Square D QMB-363-TW 100A Disconnect Switch is purpose-built for industrial and commercial environments where safe electrical isolation is non-negotiable. This high-performance isolator delivers dependable disconnection under load, enabling maintenance and service work to proceed with confidence while supporting strict lockout/tagout procedures. Built to withstand demanding duty cycles, it stands up to long-term use in busy electrical rooms and panel arrays.

Why this disconnect switch stands out

• 100A amperage rating provides robust isolation for mid-to-large electrical circuits, giving you clear, predictable disconnection when it matters most.
• Lockout/tagout compatibility designed to integrate with standard safety protocols, helping technicians secure circuits during maintenance and prevent accidental energization.
• Reliable under load engineered to disconnect safely even when circuits are energized, reducing risk to personnel and equipment during servicing.
• Durable, long-term durability built to perform in harsh industrial environments, delivering consistent protection and minimal downtime over the lifecycle of the system.
• Seamless compatibility with Square D ecosystems as part of the Square D line, ensuring straightforward integration with existing panels, enclosures, and electrical infrastructure.

Ideal use cases

Use the QMB-363-TW for routine maintenance on feeders and motor circuits, when performing wiring changes, or during any service activity that requires secure, verifiable isolation. It’s an excellent choice for facilities managers and electrical teams that prioritize worker safety and uptime in manufacturing plants, warehouses, and large commercial facilities.

Who benefits most

Electrical professionals, facilities engineers, and maintenance crews who need a reliable, code-friendly disconnect switch that supports lockout/tagout procedures and provides dependable isolation under load will find the Square D QMB-363-TW an effective solution. Its 100A rating and durable construction make it well-suited for ongoing use in demanding environments where safety and reliability are paramount.

Choose the Square D QMB-363-TW 100A Disconnect Switch to deliver clear, safe electrical isolation with enduring performance. It’s a practical, specialized solution that helps you protect personnel, safeguard equipment, and maintain operational continuity.