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Eaton 505C220G21 - Molded Case Circuit Breaker 250A 3-Pole

Cutler Hammer
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Eaton 505C220G21 is a 3-pole molded case circuit breaker from the MARK 75 family, designed to provide LI (Long-Time and Instantaneous) thermal-magnetic protection for industrial power distribution systems. It is rated for 250A at 600VAC and 3-phase operation, with an interrupting capacity of 35kA at 480VAC. The unit features a bolt-on connection, weighs 54 lb, and is classified as Type HMA for robust construction. This breaker complies with UL and CSA standards for reliable overcurrent protection. It is typically applied in panelboards, switchboards, and motor control centers requiring dependable circuit isolation and fault interruption.

Key Features & Specifications
  • Manufacturer: Eaton
  • Item Subcategory: Molded Case
  • Family: MARK 75
  • Type: HMA
  • Weight: 54 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC rating: 35kA@480V
  • Phase: 3
  • Current Rating: 250A
  • Amperage Rating: 200A
  • Voltage Rating: 240VAC, 125VDC
  • Number of Poles: 2
  • Mounting Type: Panelboard/switchboard
  • Interrupt Rating: 65 kAIC at 240VAC
  • Series/Frame: Series C, G-frame
  • Frequency Rating: 50/60 Hz
  • Trip Type: Fixed thermal-magnetic
  • UL Listed
  • CSA Listed