Square D QMB-3620 - 200A, 600V, Fusible, Switch

Square D QMB-3620 is a robust 200A, 600V fusible switch designed to deliver dependable on/off isolation and precise overcurrent protection in demanding industrial and commercial settings. Built to withstand tough environments, this switch provides a compact, maintainable solution when you need both a disconnect and reliable fuse protection in one footprint.

Why the QMB-3620 stands out

• Integrated fusible protection: The QMB-3620 combines isolation with fuse protection, helping to interrupt fault currents before they damage downstream equipment.
• High-current capability: Rated for 200A, it handles substantial motor loads and branch circuits without compromising safety or performance.
• Wide voltage handling: 600V maximum operating voltage makes it suitable for a broad range of industrial power distribution applications.
• Compact, maintainable design: Its streamlined footprint is ideal for panelboards and spaces where room is at a premium, while still offering straightforward access for fuse maintenance and replacement.
• Rugged construction for demanding environments: Engineered to endure the vibrations, dust, and temperature variations common in commercial and industrial facilities.

Ideal applications

• Motor disconnects in equipment rooms or near heavy machinery
• Panelboards requiring integrated disconnect and protection
• Branch circuit protection where a compact, easy-to-service fusible switch is advantageous
• Areas where safe isolation is essential for maintenance and servicing

Technical snapshot

• Model: QMB-3620
• Amperage: 200A
• Voltage: 600V
• Type: Fusible switch

Practical considerations and tips

• Pair the QMB-3620 with compatible circuit protection fuses to ensure coordinated response during fault conditions.
• Choose this fusible switch when you need a single device that both disconnects power and provides overcurrent protection for downstream circuits.
• Ensure installation in an appropriate enclosure or panel where accessibility, ventilation, and routing for wiring meet safety standards.
• For maintenance, replace fuses with the same type and rating to preserve performance and protection levels.

When reliability and space-conscious protection are critical, the Square D QMB-3620 delivers dependable isolation and disciplined overcurrent protection for motor loads, panelboards, and branch circuits. It’s the practical choice for facilities that value clear operation, straightforward maintenance, and lasting performance.