Westinghouse EHD1040 - Molded Case 40A Circuit Breaker
Westinghouse EHD1040 - Molded Case 40A Circuit Breaker

Westinghouse EHD1040 - Molded Case 40A Circuit Breaker

Cutler Hammer
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Westinghouse EHD1040 is a 1-pole, 40A molded case circuit breaker from the Series C family, designed to provide thermal magnetic overcurrent protection for branch circuits. It is rated for 277VAC and 125VDC with a 14kA interrupting capacity at 480V, and features a 100A/F frame size with LI (Long-Time and Instantaneous) trip functions. The unit measures 3.38 inches in depth, 6 inches in height, and 1.38 inches in width, weighs 1.65 lb, and uses a bolt-on connection with load side lug terminals accepting wire sizes from 14 AWG to 1/0 AWG. It is CSA certified, IEC rated, and UL listed, and operates within a temperature range of -13°F to 158°F (-25°C to 70°C). This breaker is suitable for use in Allen Bradley MCC, Eaton MCC, Rockwell Automation enclosed control, switchboard, and Westinghouse panel types for commercial and industrial power distribution.

Key Features & Specifications
  • Type: EHD
  • Family: Series C
  • Item Subcategory: Molded Case
  • Poles: 1
  • Current Rating: 40A
  • Voltage Rating: 277V
  • Frame Size: 100A/F
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous Trip
  • Connection: Bolt-On
  • Terminal Connection: Load Side Lug
  • MCM Size: Min. Wire Size 14 AWG Max. Wire Size 1/0 AWG
  • Dimensions: 3.38 in x 6 in x 1.38 in (Length/Depth x Height x Width)
  • Weight: 1.65 lb
  • Standards: CSA Certified, IEC Rated, UL Listed
  • Certification: CSA Certified, IEC Rated, UL Listed
  • AIC rating: 14kA@480V
  • Temp Rating: -13–158 °F (-25–70 °C)
  • Phase: 1
  • Phase Connection: A
  • Panel Type: Allen Bradley MCC, Eaton MCC Eaton, Rockwell Automation Enclosed Control, Switchboard, Westinghouse
  • Breaker Type: Standard
  • Country of Origin: Dominican Republic


Product Identification
  • UPC: 786679317358
  • GTIN: 00786679317358