Square D H366NR Disconnect Switch (Fusible) - Essential Electric Supply
Square D H366NR - Fusible Safety Switch 600A 600V (NEMA 3R)
Square D H366NR - Fusible Safety Switch 600A 600V (NEMA 3R)
Square D H366NR Disconnect Switch (Fusible) - Essential Electric Supply
Square D H366NR - Fusible Safety Switch 600A 600V (NEMA 3R)
Square D H366NR - Fusible Safety Switch 600A 600V (NEMA 3R)

Square D H366NR - Fusible Safety Switch 600A 600V (NEMA 3R)

Square D
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Square D H366NR is a heavy-duty fusible safety switch designed for isolating and protecting three-phase electrical circuits up to 600A. It provides a visible disconnect and is rated for 600V AC with an interrupting capacity of 200kA at 600V, housed in a robust NEMA 3R enclosure suitable for outdoor installations. The unit's construction features a single-configuration, three-pole design with Class R fuse compatibility and measures 1277.87 mm H x 708.15 mm W x 257.30 mm D, weighing 201 lb. It is UL listed and is typically applied in industrial power distribution, motor control centers, and as a service entrance disconnect where reliable circuit isolation and high-fault current protection are required.

Key Features & Specifications
  • Type: H-Type, Fusible Safety Disconnect Switch
  • Voltage Rating: 600V AC
  • Current Rating: 600A
  • Dimensions: 1277.87 mm H x 708.15 mm W x 257.30 mm D (50.31 in x 27.88 in x 10.13 in)
  • Weight: 201 lb
  • Standards: UL Listed
  • Applications: Industrial power distribution, service entrance, motor control isolation
  • Switch Type: Fusible
  • Configuration: Single
  • Phase: 3
  • Poles: 3
  • AIC Rating: 200kA @ 600V
  • Fuse Class: R
  • NEMA Rating: 3R
  • Family: Series E


Product Identification
  • UPC: 785901195825
  • GTIN: 00785901195825