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Square D PBQ4640GGSC - Fusible 400A 600V Bus Plug

Square D
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Square D PBQ4640GGSC Bus Plug is a fusible bus plug designed for primary circuit protection in industrial power distribution systems. This unit is rated for 600V AC and 400A, with a high interrupting capacity of 200kA at 480V, and operates on a 3-phase system. The plug measures 20.94 inches in height, 4.44 inches in width, and 3.09 inches in depth, featuring a compact I-Line construction with a fusible switch type that accepts Class H, K, or R fuses. It is CSA certified (C22.2 NO 27) and UL listed (FILE E22182), ensuring compliance with North American safety standards. Typical applications include branch circuit protection in commercial and industrial panelboards, switchboards, and motor control centers.

Key Features & Specifications
  • Type: Fusible bus plug with I-Line construction
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: Height 20.94 in (532 mm) x Depth 3.09 in (78.49 mm) x Width 4.44 in (112.78 mm)
  • Standards: CSA C22.2 NO 27-UL LISTED FILE E22182
  • Applications: Industrial power distribution, branch circuit protection
  • Switch Type: Fusible
  • Configuration: 3-phase
  • Phase: 3
  • Amperage: 400A
  • AIC rating: 200kA@480V
  • Connection: Wire
  • Poles: 4
  • Protection: Overcurrent
  • Fuse Class: H, K, R
  • Wire: 4
  • Wire Size: AWG 6...300 kcmil 1 ground; AWG 1/0...600 kcmil 2 phase and neutral
  • Enclosure: Open
  • Nema Rating: Not specified
  • Certification: CSA, UL
  • Installation Type: Panel-mounted
  • Item QTY: 1
  • Breaker Frame: Not applicable (fusible)
  • Current Rating: 400A
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-phase
  • Standards: CSA, UL
  • Compatible Frames: I-Line
  • Country of Origin: United States


Product Identification
  • UPC: 785901753315
  • GTIN: 00785901753315