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Eaton KD3125X - Molded Case Circuit Breaker 125A 3 Pole

Cutler Hammer
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Eaton KD3125X is a three-pole molded case circuit breaker from the Series C family, designed to provide overcurrent protection through thermal magnetic operation. This K Frame unit is rated for 125A continuous current at 600VAC, with an interrupting capacity of 35kA at 480VAC, and features LI (Long-Time and Instantaneous) trip functions for precise coordination. The bolt-on connection ensures secure installation in industrial panelboards, and the breaker weighs 13 lb, constructed with durable thermoplastic materials for reliable performance in demanding environments. It complies with UL 489 and CSA standards for branch circuit protection, making it suitable for commercial and industrial power distribution systems.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic
  • Voltage Rating: 600V
  • Current Rating: 125A
  • Dimensions: K Frame size
  • Standards: UL 489, CSA
  • Applications: Industrial power distribution, motor protection
  • Switch Type: Toggle
  • Configuration: 3 Pole
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: 40°C
  • Shipping Dimensions: 13 lb weight
  • Phase: 3
  • Voltage: 600V
  • Amperage: 125A
  • AIC rating: 35kA@480V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: K Frame
  • Trip Type: Thermal Magnetic
  • Panel Type: Industrial
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Copper
  • Panel Style: Bolt-On
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • Insulation Temperature: 105°C
  • Inductance: Not applicable
  • Impedance: Not applicable
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Bolt-On
  • Hz: 50/60
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 125A
  • Dist Voltage: 600V
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 125A
  • Full Load Amp Minimum: 125A
  • Enclosure: Open
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 125A
  • Amperage Minimum: 125A
  • Nema Rating: Not specified
  • Switch Style: Toggle
  • Wire Size: Not specified
  • Certification: UL 489
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Bolt-On
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3 Phase
  • Standards: UL 489, CSA
  • Compatible Frames: K Frame
  • Installation Type: Fixed
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: K Frame
  • Current Rating: 125A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not applicable
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: 40°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: Not available
  • GTIN: Not available