Square D QMJ366 - Fusible Safety Switch 600A 600V (200kA AIC)

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Square D QMJ366 is a fusible safety switch designed for providing reliable circuit protection and isolation in industrial power distribution. It is rated for 600V AC and 600A, featuring a robust three-pole, single-configuration design with a compact footprint of 78.49 mm depth by 112.78 mm width and a weight of 88.099 lb. The switch is UL and CSA certified, meets NEMA 1 standards, and offers a high interrupting capacity of 200kA at 480V for enhanced safety. Its typical applications include protecting motors, transformers, and feeder circuits in manufacturing and commercial facilities.

Key Features & Specifications
  • Type: Fusible safety switch, panel mount, QMJ type
  • Voltage Rating: 600V AC
  • Current Rating: 600A
  • Dimensions: 78.49 mm (Depth) x 112.78 mm (Width)
  • Standards: UL, CSA, NEMA 1
  • Applications: Motor, transformer, and feeder circuit protection in industrial and commercial power distribution
  • Switch Type: Fusible
  • Configuration: Single
  • Poles: 3
  • Phase: 3
  • AIC rating: 200kA@480V
  • Wire Size: 14 to 2 AWG (Copper/Aluminum)
  • Certification: UL, CSA
  • Compatible Frames: ED
  • Nema Rating: 1
  • Fuse Class: J
  • Family: QMB Series E1-E2
  • Country of Origin: United States
  • Weight: 88.099 lb


Product Identification
  • UPC: 785901209089
  • GTIN: 00785901209089