Square D QMB364W – 200A, 600V, 3-Pole Fusible Panelboard Switch – QMB Series

Introducing the Square D QMB364W — a purpose-built fusible panelboard switch from Schneider Electric's trusted Square D QMB Series. Engineered for reliability in demanding electrical distributions, it delivers a robust 200 A load disconnect at up to 600 V in a three-pole configuration. When used with the appropriate fuse class, the QMB364W provides coordinated overcurrent protection right at the panel, simplifying wiring, maintenance, and protection coordination inside QMB fusible panelboards.

• 200 A at 600 V capability to handle mid-to-large feeder circuits with confidence
• Three-pole design enables balanced distribution and seamless integration into standard panelboard layouts
• KAIC 200 kAIC interrupting rating delivers strong protection against short circuits and fault conditions
• Integrated protection and disconnect reduces component count and potential points of failure in the panel
• Panel-ready and compact engineered to slot into standard QMB fusible panelboards for space-efficient protection
• Durable, field-friendly construction built to withstand routine switch operations in commercial and light industrial environments
• Coordinated with fuse classes ensures predictable protection behavior aligned with system design goals

The QMB364W stands out by delivering integrated protection and disconnect in a single, tightly coordinated device. This means fewer parts to manage, simpler wiring, and a clear protection strategy right at the panel. Its compact, panel-ready form fits neatly into QMB fusible panelboards, helping you optimize space without sacrificing protection or serviceability. Built for longevity in real-world installations, it stands up to the rigors of commercial and light-industrial facilities while providing dependable performance when you need it most.

Ideal use cases include mid-to-large distribution feeds where a dedicated, high-current load disconnect is required within a QMB fusible panelboard. It’s a natural fit for feeder circuits feeding switchgear, transformers, or motor control centers in commercial or light industrial facilities. It also excels in panel configurations that require a single, reliable point of disconnect and overcurrent protection for a 200 A feeder. For new installations or panel upgrades, the QMB364W offers a proven, standardized protection device from a globally recognized brand.

Practical installation notes: Use the QMB364W within the guidelines of QMB fusible panelboards and pair it with the appropriate fuse class to achieve the intended overcurrent protection. Its 200 kAIC interrupting rating provides a healthy safety margin for typical commercial and light-industrial fault scenarios, helping protect downstream equipment and minimize nuisance outages.

Who benefits most: electrical engineers, panel builders, and maintenance personnel responsible for reliable, code-compliant power distribution in commercial and light-industrial settings.