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Siemens JKL3B300 - Molded Case Circuit Breaker 300A 600V

Siemens
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Siemens JKL3B300 is a 3-pole molded case circuit breaker from the JKL Series, designed to provide thermal magnetic protection for 3-phase power systems. It is rated for 300A continuous current at 600VAC, with LI (Long-Time and Instantaneous) trip functions for reliable overcurrent protection. The unit features a bolt-on connection for secure installation and weighs 12 lb. It complies with UL and ANSI standards for safety and performance. This breaker is suited for industrial and commercial applications requiring robust circuit protection.

Key Features & Specifications
  • Type: Molded Case
  • Manufacturer: Siemens
  • Family: JKL Series
  • Type: JKL
  • Weight: 12 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • Phase: 3
  • Current Rating: 300A
  • Amperage: 300 Amps
  • Voltage Rating: 600 VAC
  • Poles: 3 Pole
  • Mounting Type: Bolt-On
  • Trip Unit: Thermal Magnetic
  • Series/Frame: JKL
  • Interrupt Rating: Typically 25kA at 480V (common for JJ/JKL series)
  • Phase: 3 Phase
  • Certifications: UL Listed, ANSI Compliant (per typical Siemens standards)


Part Number: JKL3B300