Square D QMB321 - Fusible Safety Switch 240V 3-Phase (30A, 200kA AIC)

Square D QMB321 is a fusible safety switch designed for industrial power distribution protection. This 3-phase panel-mount switch features a 240V AC voltage rating with a 30A current capacity and 200kA interrupting rating at 240V for reliable circuit protection. The rugged NEMA 1 enclosure houses a single-configuration, 3-pole fusible switch mechanism compatible with HED frames, constructed with Class R, H, and K fuse compatibility. UL-listed and compliant with industrial safety standards, it's engineered for motor control centers, HVAC systems, and heavy equipment power management.

Key Features & Specifications

• Type: Fusible safety switch, panel mount, QMB Series D2
• Voltage Rating: 240V AC
• Current Rating: 30A
• Configuration: Single
• Poles: 3
• Phase: 3-phase
• AIC Rating: 200kA @ 240V
• Fuse Class: R, H, K compatible
• NEMA Rating: 1
• Compatible Frames: HED
• Switch Style: Fusible
• Weight: 30 lb