Square D QMB-3620 - 200A, 3-Pole, Fused Disconnect Switch

Meet the Square D QMB-3620, a 200A, 3-Pole Fused Disconnect Switch designed for industrial and commercial environments where safe electrical isolation is non‑negotiable. It delivers dependable disconnection under load and supports robust lockout/tagout procedures, helping protect maintenance personnel and keep equipment protected during service intervals.

Built to endure demanding service conditions, this fused disconnect switch provides reliable protection with a clear, decisive isolation point. The three-pole design ensures simultaneous isolation of all live conductors, so technicians can work confidently without the risk of unexpected energization.

Key benefits

• 200A, 3-Pole design: ensures all conductors are isolated at once, preventing backfeed during maintenance.
• Integrated fused protection: provides overcurrent protection within the disconnect, reducing fault energy during startup and shutdown.
• Lockout/tagout readiness: supports standard safety procedures to keep personnel safe during servicing.
• Dependable disconnection under load: engineered to reliably interrupt current when switching, even with heavier loads.
• Industrial-grade durability: built for long-term service in the harsh environments typical of industrial and commercial facilities.
• Brand assurance: Square D, a trusted name in electrical safety and panel protection.

Ideal applications

• Main equipment disconnects in manufacturing facilities and large commercial spaces
• Isolation points within electrical panels, service entrances, and motor control circuits
• Maintenance-only shutoffs for pumps, conveyors, and other heavy-duty loads

Specifications at a glance

• Amperage rating: 200A
• Number of poles: 3-Pole
• Product type: Fused Disconnect Switch
• Brand: Square D
• Model: QMB-3620