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Eaton KD3125X - Molded Case Circuit Breaker 125A 600V

Cutler Hammer
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Eaton KD3125X is a Series C K-frame molded case circuit breaker designed for low voltage distribution system protection, providing reliable overcurrent and short-circuit interruption. This three-pole, 125A unit operates at 600VAC with a thermal-magnetic trip mechanism offering long-time and instantaneous (LI) protection functions. The bolt-on connection design and compact K-frame construction deliver a robust, field-proven solution weighing 13 lb. It is rated for an interrupting capacity of 35kA at 480VAC, with additional ratings of 65kA at 240VAC and 25kA at 600VAC. This breaker is suited for industrial and commercial applications requiring dependable branch circuit or feeder protection in three-phase systems.

Key Features & Specifications
  • Type: Molded Case
  • Manufacturer: Eaton
  • Family: Series C
  • Type: KD
  • Weight: 13 lb
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: K Frame
  • Voltage Rating: 600 VAC
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC rating: 35kA@480V
  • Phase: 3
  • Current Rating: 125 Amp
  • Interrupt Rating: 65 kA @ 240 VAC
  • Interrupt Rating: 25 kA @ 600 VAC
  • Trip Unit: Fixed Thermal-Magnetic