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Siemens JJ2B400 - Molded Case 400A 2-Pole

Siemens
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Siemens JJ2B400 Circuit Breaker - Molded Case 400A 2-Pole The Siemens JJ2B400 is a 2-pole molded case circuit breaker from the JJ Frame family, designed to provide LI (Long-Time and Instantaneous) protection for industrial electrical systems. This thermal magnetic breaker is rated for 600V AC, 400A continuous current, and delivers an interrupting capacity of 25kA at 480V, ensuring reliable fault interruption in single-phase applications. The unit weighs 22 lb and features a bolt-on connection for secure panel mounting, with a compact frame size suited for distribution panels. It complies with UL and NEMA standards for molded case circuit breakers, making it suitable for motor control centers, switchboards, and industrial power distribution. Typical applications include protection of feeders, branch circuits, and heavy machinery in manufacturing plants and commercial facilities.

Key Features & Specifications
  • Type: Molded Case, Thermal Magnetic, LI (Long-Time and Instantaneous) Trip
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Poles: 2
  • Phase: 1
  • AIC Rating: 25kA@480V
  • Connection: Bolt-On
  • Weight: 22 lb
  • Family: JJ Frame
  • Functions: LI - Long-Time and Instantaneous
  • Protection: Thermal Magnetic
  • Standards: UL, NEMA
  • Applications: Industrial power distribution, motor control centers, switchboards, feeder protection


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