Square D QMB321HW Panel Mount Switch (Fusible) - Essential Electric Supply
Square D QMB321HW - Fusible Safety Switch 30A 240V 3-Pole
Square D QMB321HW - Fusible Safety Switch 30A 240V 3-Pole
Square D QMB321HW - Fusible Safety Switch 30A 240V 3-Pole
Square D QMB321HW Panel Mount Switch (Fusible) - Essential Electric Supply
Square D QMB321HW - Fusible Safety Switch 30A 240V 3-Pole
Square D QMB321HW - Fusible Safety Switch 30A 240V 3-Pole
Square D QMB321HW - Fusible Safety Switch 30A 240V 3-Pole

Square D QMB321HW - Fusible Safety Switch 30A 240V 3-Pole

Square D
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Square D QMB321HW is a panel-mounted fusible safety switch designed for providing reliable circuit protection and isolation in industrial three-phase applications. It features a 240V AC voltage rating and a 30A current rating, housed in a compact NEMA 1 enclosure measuring 114 mm H x 112.78 mm W x 78.49 mm D with a weight of 15.74 lb. The switch is certified to CSA and UL standards and offers a high 200kA interrupting capacity at 240V for robust fault protection. Its typical applications include motor control and power distribution where a 3-pole fusible disconnect is required.

Key Features & Specifications
  • Type: Panel-mounted, fusible safety switch, QMB Series E1-E2
  • Voltage Rating: 240V AC
  • Current Rating: 30A
  • Dimensions: 114 mm H x 112.78 mm W x 78.49 mm D (4.49 in x 4.44 in x 3.09 in)
  • Weight: 15.74 lb
  • Standards: CSA, UL
  • Applications: Industrial motor control, three-phase power distribution
  • Switch Type: Fusible
  • Configuration: Single
  • Poles: 3
  • Phase: 3
  • AIC Rating: 200kA @ 240V
  • Wire Size: 12 to 2 AWG (Aluminum), 14 to 4 AWG (Copper)
  • Fuse Class: R, H, K
  • NEMA Rating: 1
  • Compatible Frames: ED
  • Country of Origin: United States


Product Identification
  • UPC: 785901748052
  • GTIN: 00785901748052