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Siemens JD63T300 - 300A Thermal Magnetic Breaker (35kA AIC)

Siemens
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Siemens JD63T300 is a 300A Sentron Series thermal magnetic circuit breaker designed for providing reliable overcurrent and short-circuit protection in three-phase industrial power distribution systems. It features a 600V AC voltage rating and a 35kA interrupting capacity at 480V, with a robust bolt-on connection for secure installation using copper conductors from AWG 3/0 to 500 KCMIL or aluminum from AWG 4/0 to 500 KCMIL. This three-pole breaker is constructed within a 300A frame and offers LI (Long-time and Instantaneous) trip functions, operating reliably across a temperature range of -25°C to 70°C. It complies with UL and IEC standards and is RoHS compliant, ensuring suitability for a wide range of commercial and industrial panelboards and switchgear applications where dependable circuit protection is critical.

Key Features & Specifications
  • Type: Thermal Magnetic Circuit Breaker, Bolt-On Connection
  • Voltage Rating: 600V AC
  • Current Rating: 300A
  • Frame Size: 300A
  • Poles: 3
  • Phase: 3
  • AIC Rating: 35kA @ 480V AC
  • Protection: Thermal Magnetic
  • Functions: LI (Long-time & Instantaneous Trip)
  • Wire Size: AWG 3/0 to 500 KCMIL (Cu), AWG 4/0 to 500 KCMIL (Al)
  • Standards: RoHS
  • Certification: UL, IEC
  • Compatible Frames: JD, HJD, HJXD, HHJD, HHJXD
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Weight: 2.2 lb
  • Family: Sentron Series
  • Country of Origin: Mexico


Product Identification
  • UPC: 783643213470
  • GTIN: 00783643213470