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Siemens KM3B300 - 300A Molded Case Breaker 600V 3-Pole

Siemens
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Siemens KM3B300 is a 3-pole 300A molded case circuit breaker from the K Frame family, designed for LI (Long-Time and Instantaneous) protection in industrial power distribution systems. It operates at a voltage rating of 600V and 3-phase, with a thermal magnetic protection mechanism and an AIC rating of 50kA at 480V. The unit weighs 56 lb and features a bolt-on connection for secure installation. This breaker complies with industry standards for molded case circuit breakers. Typical applications include motor control centers, panelboards, and switchboards requiring reliable overcurrent protection.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, K Frame, KM Type
  • Voltage Rating: 600V AC
  • Current Rating: 300A
  • Poles: 3
  • Phase: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC Rating: 50kA@480V
  • Functions: LI - Long-Time and Instantaneous
  • Weight: 56 lb


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