Square D QMB364 - 200A, 600V, 3-Pole Panelboard Switch / Switchboard Unit | AmpState

Meet the Square D QMB364 fusible panelboard switch from the QMB series—engineered for reliable load switching and precise overcurrent protection in lighting and distribution panelboards. With a robust 200 A rating and 600 V capability in a compact 3-pole design, this unit delivers coordinated protection when paired with the appropriate upstream protection and fuse class. Built by Schneider Electric, the QMB364 is a trusted choice for clean isolation and dependable service in demanding electrical environments.

• Coordinated protection: When used with the correct upstream protection and fuse class, the QMB364 provides clear fault isolation and enhanced system reliability, reducing downtime and damage.
• Three-pole, balanced power: Ideal for three-phase systems, ensuring synchronized switching across all phases and safer operation during maintenance.
• QMB series compatibility: Seamless integration with Square D panelboards and other QMB components for streamlined panel upgrades and replacements.
• Durable, trusted brand: Manufactured by Schneider Electric (Square D), built to withstand industrial lighting and distribution environments.
• Clear part identification: Part Number QMB364 for straightforward ordering and replacements, minimizing downtime during service events.
• Fusible protection with safe isolation: The fusible switch design delivers inherent protection while enabling rapid disconnection for maintenance.

Technical overview

• Amperage: 200 A
• Voltage: 600 V
• Poles: 3
• Series: QMB
• Part Number: QMB364
• Manufacturer: Schneider Electric / Square D
• Application: Fusible panelboard switch for lighting and distribution panelboards

Ideal uses and scenarios

• New installations where reliable load switching and overcurrent protection are essential for lighting and distribution panelboards.
• Panel upgrades or retrofits requiring a compact fusible switch that coordinates with upstream protective devices.
• Maintenance scenarios needing a clean, staged disconnection to safely isolate circuits.
• Industrial or commercial environments demanding robust performance under demanding electrical loads.

Installation and compatibility notes

• Use with appropriate upstream protection and fuse class to achieve proper protection coordination.
• Compatible with Square D QMB series panelboards, enabling straightforward substitution or expansion within existing panels.
• Verify system voltage and current ratings align with project specs (600 V, 200 A) for safe, compliant operation.

Choosing the Square D QMB364 means selecting a purpose-built fusible switch that delivers precise protection and reliable operation in lighting and distribution panelboards. Whether you’re upgrading an enclosure or specifying components for a new installation, this 3-pole, 200 A, 600 V unit helps keep electrical systems orderly, protected, and ready for maintenance—backed by Schneider Electric’s engineering credentials and the proven QMB lineup.