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Siemens JD63M300 - Molded Case Circuit Breaker 300A 600V

Siemens
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Siemens JD63M300 is a 3-pole, 300A molded case circuit breaker from the Sentron Series, designed for thermal magnetic overload and short circuit protection in low voltage power distribution systems. It operates at a maximum voltage rating of 600V AC and provides an interrupting capacity of 35kA at 480V, with LI (Long-Time and Instantaneous) trip functions for precise current management. The unit features a JD frame size, weighs 24 lb, and is configured for bolt-on mounting, with a three-phase design and an operating temperature range of -13°F to 158°F (-25°C to 70°C). It is certified to UL and IEC standards and complies with RoHS requirements, making it suitable for industrial and commercial applications requiring reliable circuit protection.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker
  • Manufacturer: Siemens
  • Series: Sentron Series
  • Model: JD63M300
  • Poles: 3
  • Current Rating: 300A
  • Voltage Rating: 600V AC
  • Interrupt Rating: 35kA at 480V
  • Trip Unit: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: JD Frame
  • Connection: Bolt-On
  • Phase: 3
  • Weight: 24 lb
  • Temperature Rating: -13°F to 158°F (-25°C to 70°C)
  • Standards: RoHS
  • Certification: UL, IEC