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NSJ400 - Molded Case Circuit Breaker 400A 600V AC

United Fuses
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NSJ400 is a molded case circuit breaker designed for industrial overcurrent protection and electrical distribution control. It is rated for 600V AC and carries a current rating of 400A, with a compact frame size suitable for panelboard or switchboard installations. The unit weighs 5.19 lb and features a thermal-magnetic trip mechanism for reliable short-circuit and overload protection. This breaker complies with UL 489 and CSA standards, ensuring safe operation in commercial and industrial environments. Typical applications include motor control centers, distribution panels, and heavy machinery circuits.

Key Features & Specifications
  • Type: Molded case circuit breaker, thermal-magnetic trip
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: Compact frame size
  • Standards: UL 489, CSA
  • Applications: Motor control centers, distribution panels, heavy machinery
  • Weight: 5.19 lb


Product Identification
  • UPC: Not available
  • GTIN: Not available