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Square D PTB502G - Fusible 225A 480V Bus Plug (I-Line)

Square D
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The Square D PTB502G is a fusible bus plug from the I-Line family, designed for overcurrent protection and power distribution in industrial electrical systems. It is rated for 480V AC, 225A, and 3-phase operation, providing robust electrical isolation and circuit protection. This unit measures 8.5 inches in height, 16.4 inches in width, and 7.8 inches in depth, weighing 18.781 lb, and features a steel enclosure with a fusible switch mechanism. It is UL and CSA certified, ensuring compliance with North American safety and performance standards. Typical applications include branch circuit protection in commercial and industrial power distribution panels, motor control centers, and manufacturing facilities.

Key Features & Specifications
  • Type: Fusible bus plug, I-Line family, steel enclosure
  • Voltage Rating: 480V AC
  • Current Rating: 225A
  • Dimensions: 8.5 in (216 mm) x 16.4 in (416 mm) x 7.8 in (197 mm) (Height x Width x Depth)
  • Standards: UL, CSA
  • Applications: Industrial power distribution, branch circuit protection, motor control centers
  • Switch Type: Fusible switch
  • Configuration: 3-phase, 4-wire
  • Wire Size: AWG 6...AWG 2/0 (1 ground), 300 kcmil (1 phase and neutral)
  • Phase: 3
  • Amperage: 225A
  • Connection: Wire
  • Poles: 3
  • Protection: Overcurrent
  • Enclosure: Steel
  • Certification: UL, CSA
  • Country of Origin: United States
  • Weight: 18.781 lb


Product Identification
  • UPC: 785901087410
  • GTIN: 00785901087410