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Siemens JD63M300 - Molded Case 300A 3-Pole

Siemens
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Siemens JD63M300 Circuit Breaker - Molded Case 300A 3-Pole The Siemens JD63M300 is a 300A, 3-pole molded case circuit breaker from the Sentron Series, designed for LI (Long-Time and Instantaneous) protection in industrial power distribution systems. This thermal-magnetic breaker operates at a maximum voltage rating of 600V AC and provides an interrupting capacity of 35kA at 480V, with a three-phase configuration and bolt-on connection for secure panel mounting. The JD Frame unit weighs 24 lb and features a compact construction suitable for standard panelboards, with an operating temperature range of -13°F to 158°F (-25°C to 70°C). It complies with RoHS standards and holds UL and IEC certifications, ensuring reliable overcurrent protection in commercial and industrial environments. Typical applications include motor control centers, switchboards, and distribution panels requiring robust circuit isolation and fault interruption.

Key Features & Specifications
  • Type: Molded Case, Sentron Series, JD Frame, Thermal Magnetic
  • Voltage Rating: 600V AC
  • Current Rating: 300A
  • Poles: 3
  • Connection: Bolt-On
  • AIC Rating: 35kA@480V
  • Phase: 3
  • Functions: LI - Long-Time and Instantaneous
  • Protection: Thermal Magnetic
  • Temp Rating: -13°F to 158°F (-25°C to 70°C)
  • Weight: 24 lb
  • Standards: RoHS
  • Certification: UL, IEC


Product Identification
  • UPC: Not available
  • GTIN: Not available