Square D EJB34050SA - Molded Case Circuit Breaker 50A 3-Pole
Square D EJB34050SA - Molded Case Circuit Breaker 50A 3-Pole

Square D EJB34050SA - Molded Case Circuit Breaker 50A 3-Pole

Square D
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Square D EJB34050SA is a bolt-on molded case circuit breaker designed for thermal-magnetic overload and short-circuit protection in industrial and commercial power distribution systems. It is rated for 50A at 480V AC with a 65kA interrupting capacity at 480V, featuring three poles and a factory-installed shunt trip for remote tripping in emergency power-off and automated safety shutdown applications. The breaker measures 5.66 in (143.76 mm) in height, 3.92 in (99.57 mm) in width, and 4.05 in (102.87 mm) in depth, weighing 4.34 lb, with a bolt-on connection for installation in NF and NQ panelboards. It is cULus certified and UL 489 Listed, with an operating temperature range of -13 to 158 °F (-25 to 70 °C), and accommodates wire sizes from AWG 12 to AWG 2/0 for aluminum and AWG 14 to AWG 2/0 for copper. This breaker is suited for remote disconnect and control system applications in three-phase, 480Y/277 V AC environments.

Key Features & Specifications
  • Manufacturer: Schneider Electric
  • Item Subcategory: Molded Case
  • Family: EJB Series
  • Country of Origin: Mexico
  • Dimensions: 5.66 in (143.76 mm) x 3.92 in (99.57 mm) x 4.05 in (102.87 mm) (Height x Width x Depth)
  • Weight: 4.34 lb
  • Functions: Long-Time and Instantaneous Trip
  • Voltage Rating: 480V
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • Wire Size: AWG 12 to AWG 2/0, Aluminum, AWG 14 to AWG 2/0, Copper
  • Certification: cULus
  • AIC rating: 65kA@480V
  • Phase: 3
  • Temp Rating: -13–158 °F (-25–70 °C)
  • Current Rating: 50A
  • Type: EJB
  • Amperage Rating: 50 A
  • Interrupting Rating: 18 kA @ 480Y/277 V AC
  • Trip Unit: Fixed thermal-magnetic
  • Accessory: Factory-installed shunt trip
  • Mounting: Bolt-on (for NF/NQ panelboards)
  • Application: Remote tripping, EPO systems, and automated shutdown control
  • Certifications: UL 489 Listed, CSA Certified


Product Identification
  • UPC: 785901648659