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Siemens JD63B400 - 400A Molded Case Circuit Breaker (35kA AIC)

Siemens
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Siemens JD63B400 is a molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in three-phase industrial power distribution systems. It features a 400A current rating and a 600V voltage rating, housed within a compact JD frame with a robust bolt-on connection for secure installation. This thermal magnetic breaker offers both long-time and instantaneous (LI) protection functions, is constructed to operate in temperatures from -25°C to 70°C, and complies with key industry standards including UL, IEC, and RoHS. Its 35kA interrupting capacity at 480V makes it suitable for protecting feeders and branch circuits in panelboards and switchgear, accommodating copper conductors from 3/0 AWG to 500 kcmil and aluminum from 4/0 AWG to 500 kcmil.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic Protection, Bolt-On Connection
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Frame Size: JD Frame
  • Poles: 3
  • Phase: 3
  • AIC Rating: 35kA @ 480V
  • Protection Functions: LI (Long-Time and Instantaneous)
  • Connection: Bolt-On
  • Wire Size: 3/0 AWG to 500 kcmil Copper, 4/0 AWG to 500 kcmil Aluminum
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Standards & Certification: UL, IEC, RoHS
  • Weight: 0.022 lb
  • Family: Sentron Series
  • Country of Origin: Mexico


Product Identification
  • UPC: 783643213210
  • GTIN: 00783643213210