Square D QMB321T Panel Mount Switch (Fusible) - Essential Electric Supply
Square D QMB321T Panel Mount Switch (Fusible) - Essential Electric Supply

Square D QMB321T - Fusible Safety Switch 240V 30A (200kA AIC @240V)

Square D
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Square D QMB321T is a fusible safety switch designed for industrial power distribution protection. This UL LISTED panel-mount switch features a 240V AC rating with 30A current capacity and 200kA interrupting rating at 240V for reliable circuit protection. The compact 4.5-inch (114.30 mm) enclosure houses a 3-pole dual/twin configuration compatible with HHED frames, constructed to NEMA 1 standards for indoor use. Certified for R, H, and K fuse classes, this US-made component meets rigorous industrial safety requirements for three-phase power systems in manufacturing and commercial facilities.

Key Features & Specifications
  • Type: Fusible safety switch, QMB Series D2, panel mount
  • Voltage Rating: 240V AC
  • Current Rating: 30A
  • Dimensions: 4.5 in (114.30 mm)
  • Standards: UL LISTED, NEMA 1
  • Applications: Industrial power distribution, three-phase systems
  • Switch Style: Fusible
  • Configuration: Dual/Twin
  • Poles: 3
  • AIC rating: 200kA@240V
  • Phase: 3
  • Fuse Class: R, H, K
  • Compatible Frames: HHED
  • Weight: 7.1 lb
  • Country of Origin: United States


Product Identification
  • UPC: 785901535874
  • GTIN: 00785901535874