Square D QMB361T - 30A, 600V, 3-Pole Panelboard Switch / Switchboard Unit | AmpState

Square D QMB361T is a rugged fusible panelboard switch from the trusted QMB series, purpose-built for lighting and distribution panelboards. At 30 A and 600 V, this 3-pole switch delivers precise control over three-phase feeders while providing essential protection when paired with the correct upstream protection and fuse class. Built by Schneider Electric, it brings proven reliability to commercial and industrial electrical distributions.

• Three-pole design for modern 3-phase systems: ideal for balanced, three-phase loads in lighting and distribution setups that rely on reliable, coordinated power delivery.
• Fusible protection coordinated with upstream devices: enables safe load switching while ensuring proper overcurrent protection when used with appropriately rated upstream fuses.
• Seamless integration with QMB panelboards: designed to fit neatly into existing Square D lighting and distribution panels, keeping your electrical system organized and easy to service.
• Durable, industry-grade construction: built to withstand demanding commercial and industrial environments without compromising performance over time.
• Clear isolation for maintenance: provides a safe, rapid-disconnect option for feeder circuits, minimizing downtime during service or fault conditions.

Ideal applications

• Lighting and distribution panelboards in commercial buildings, warehouses, and facilities with three-phase loads.
• Subpanels and feeders in industrial environments where reliable isolation and protection are essential.
• Systems that benefit from a coordinated switch-plus-protection approach, optimized for quick maintenance and safer operation.

Key specifications at a glance

• Amperage: 30 A
• Voltage rating: 600 V
• Poles: 3
• Series: QMB
• Part number: QMB361T
• Manufacturer: Square D / Schneider Electric

Practical deployment guidance

To maximize performance and safety, pair the QMB361T with appropriately rated upstream protection and fuse classes as specified for your panelboard configuration. This coordination is essential for achieving effective fault isolation, reliable operation, and code-compliant installation. Plan for routine inspections of connections and terminals to maintain optimal contact integrity over time, and stock compatible fuses to simplify maintenance when schedules require rapid service.