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Square D EJB34125SA - Molded Case Circuit Breaker 125A 480V 3P

Square D
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Square D EJB34125SA is a three-pole molded case circuit breaker designed to provide reliable overcurrent and short-circuit protection for three-phase industrial electrical systems. It features a 125A current rating and a 480V AC voltage rating, housed within a compact, bolt-on frame measuring 143.76 mm H x 99.57 mm W x 102.87 mm D and weighing 4.34 lb. The breaker utilizes a thermal-magnetic trip mechanism with long-time and instantaneous (LI) functions, ensuring compliance with industry protection standards, and is rated for an interrupting capacity of 65kA at 480V. Its robust construction supports operation in ambient temperatures from -25°C to 70°C and includes a factory-installed 120V shunt trip for remote tripping capability, making it suitable for use in panelboards, switchboards, and industrial control panels.

Key Features & Specifications
  • Type: EJB Series, Three-Pole Molded Case Circuit Breaker with Thermal-Magnetic Protection
  • Voltage Rating: 480V AC
  • Current Rating: 125A
  • Dimensions: 143.76 mm H x 99.57 mm W x 102.87 mm D (5.66 in x 3.92 in x 4.05 in)
  • Standards: Designed to meet applicable industry standards for circuit protection
  • Applications: Panelboards, Switchboards, Industrial Control Panels
  • Switch Type: Integrated Shunt Trip
  • Configuration: Bolt-On
  • Coil Voltage Maximum: 120V (Shunt Trip)
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Shipping Dimensions: As per product dimensions
  • Phase: 3
  • Voltage: 480V
  • Amperage: 125A
  • AIC rating: 65kA @ 480V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous (LI)
  • Frame Size: EJB
  • Trip Type: Thermal-Magnetic
  • Wire Size: AWG 12 to 2/0 (Aluminum), AWG 14 to 2/0 (Copper)
  • Control Voltage Maximum: 120V (Shunt Trip)
  • Mounting: Bolt-On
  • Certification: See Standards
  • Terminal Connection: Bolt-On
  • Standards: Industry Standard
  • Breaker Frame: EJB
  • Current Rating: 125A
  • Operating Temperature Maximum Celsius: 70°C


Product Identification
  • UPC: 785901649410
  • GTIN: 00785901649410