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Siemens JD63B300 - Molded Case Circuit Breaker 300A 3P (35kA AIC)

Siemens
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Siemens JD63B300 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 300A current rating and a 600V AC 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 rated for 35kA interrupting capacity at 480V, and operates reliably across a temperature range of -25°C to 70°C. Constructed in compliance with RoHS standards and certified to UL and IEC requirements, it is engineered for integration into panelboards and switchgear for commercial and industrial applications.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic Protection, LI (Long-time & Instantaneous) Functions
  • Voltage Rating: 600V AC
  • Current Rating: 300A
  • Frame Size: JD Frame
  • Poles: 3
  • Connection: Bolt-On
  • AIC Rating: 35kA @ 480V AC
  • Phase: 3
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous (LI)
  • Standards: RoHS
  • Certification: UL, IEC
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Family: Sentron Series
  • Weight: 0.022 lb


Product Identification
  • UPC: 783643213197
  • GTIN: 00783643213197