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Eaton MD3300W - Molded Case Circuit Breaker 300A 600V 3-Pole

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Eaton MD3300W is a 300 Amp, 3-pole molded case circuit breaker from the Series C family, designed for overcurrent protection in power distribution systems. It operates at 600VAC and 250VDC with a thermal-magnetic trip unit providing long-time and instantaneous (LI) functions for reliable fault clearing. This bolt-on unit weighs 33 lb and features a fixed mounting configuration with a feed-thru connection. The breaker delivers an interrupting rating of 50kA at 480VAC, ensuring robust short-circuit protection in commercial and industrial environments. It is suitable for 3-phase applications requiring consistent and dependable circuit isolation.

Key Features & Specifications
  • Manufacturer: Eaton
  • Item Subcategory: Molded Case
  • Family: Series C
  • Type: MD
  • Weight: 33 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600 VAC / 250 VDC
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC rating: 50 kA @ 480 VAC
  • Phase: 3
  • Current Rating: 300 A
  • Series/Frame: MDL (Series C)
  • Trip Unit: Fixed Thermal / Fixed Magnetic
  • Mounting Type: Fixed
  • Connection Type: Feed-Thru
  • Interrupt Rating: 65 kA @ 240 VAC