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Siemens JJ63B400 - Molded Case 400A 600V 3-Pole Breaker

Siemens
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The Siemens JJ63B400 is a 3-pole molded case circuit breaker from the JJ Frame family, designed to provide LI (Long-Time and Instantaneous) protection for industrial electrical systems. It is rated for 600V AC, 400A continuous current, and delivers a 25kA interrupting capacity at 480V, utilizing a thermal magnetic trip mechanism for reliable overcurrent protection. The unit features a bolt-on connection style, weighs 22 lb, and is constructed for 3-phase applications, ensuring robust performance in demanding environments. This breaker complies with industry standards for molded case circuit breakers, making it suitable for protecting feeders and branch circuits in commercial and industrial power distribution panels.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic, LI (Long-Time and Instantaneous)
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Poles: 3
  • Phase: 3
  • AIC Rating: 25kA@480V
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Weight: 22 lb
  • Family: JJ Frame
  • Type: JJ
  • Item Subcategory: Molded Case


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