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Siemens JL3-B400 - Molded Case 400A 600V AC Breaker

Siemens
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Siemens JL3-B400 Circuit Breaker is a molded case circuit breaker designed for industrial overcurrent protection and electrical distribution. It operates at a voltage rating of up to 600V AC and supports a current rating of 400A, ensuring reliable interruption of fault currents. The unit weighs 17 lb and features a robust thermoplastic construction with a compact frame size for panel mounting. It complies with UL 489 and CSA standards, making it suitable for use in switchboards, motor control centers, and distribution panels. Typical applications include protecting feeders, branch circuits, and heavy machinery in manufacturing and commercial facilities.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: Compact frame size
  • Standards: UL 489, CSA
  • Applications: Industrial overcurrent protection, switchboards, motor control centers
  • Weight: 17 lb
  • Item Subcategory: Molded Case


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