Square D EJB34040 - Molded Case Circuit Breaker 40A 480V 3P
Square D EJB34040 - Molded Case Circuit Breaker 40A 480V 3P
Square D EJB34040 - Molded Case Circuit Breaker 40A 480V 3P
Square D EJB34040 - Molded Case Circuit Breaker 40A 480V 3P

Square D EJB34040 - Molded Case Circuit Breaker 40A 480V 3P

Square D
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The Square D EJB34040 is a three-pole molded case circuit breaker designed to provide reliable thermal-magnetic protection for three-phase industrial power distribution systems. It features a 40A current rating and a 480V AC voltage rating, housed within a compact J-frame/E-frame design measuring 143.76 mm H x 74.68 mm W x 102.87 mm D and weighing 3.59 lb. This bolt-on breaker is cULus certified for safety and is engineered for operation in temperatures from -25 to 70 °C, making it suitable for installation in NF panelboards where its 65kA interrupting capacity at 480V safeguards against high fault currents. Its lug terminals accommodate copper wire from 14 AWG to 2/0 AWG or aluminum wire from 12 AWG to 2/0 AWG.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic Protection with Long-Time and Instantaneous (LI) Trip
  • Voltage Rating: 480V AC
  • Current Rating: 40A
  • Dimensions: 143.76 mm H x 74.68 mm W x 102.87 mm D (5.66 in x 2.94 in x 4.05 in)
  • Standards & Certification: cULus
  • Applications: Three-phase power distribution in industrial NF panelboards
  • Switch Type: Circuit Breaker
  • Configuration: Bolt-On Connection
  • Phase: 3
  • AIC Rating: 65kA @ 480V
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI (Long-Time and Instantaneous Trip)
  • Frame Size: J; E-Frame
  • Panel Type: NF Panelboard
  • Breaker Type: Molded Case
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • MCM Size / Wire Size: Min. 12 AWG (Al) / 14 AWG (Cu); Max. 2/0 AWG (Cu/Al)
  • Terminal Connection: Lug
  • Connection: Bolt-On
  • Wire Size: AWG 12 to 2/0 (Aluminum), AWG 14 to 2/0 (Copper)
  • Certification: cULus
  • Family: EJB Series
  • Country of Origin: Mexico
  • Weight: 3.59 lb


Product Identification
  • UPC: 785901397700
  • GTIN: 00785901397700