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Square D EDB34125 - Molded Case Circuit Breaker 125A 480Y/277V

Square D
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Square D EDB34125 is a molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in three-phase electrical systems. It features a 125A current rating and a 480Y/277V voltage rating, housed within a compact, bolt-on frame measuring 143.76 mm H x 74.68 mm W x 102.87 mm D and weighing 3.501 lb. This thermal magnetic breaker is certified to cULus and IEC standards, offering an interrupting capacity of 18kA at 480V with long-time and instantaneous (LI) trip functions for coordinated protection. Its lug terminals accommodate copper wire from AWG 14 to 2/0 and aluminum wire from AWG 12 to 2/0, making it suitable for installation in NF-style panelboards within commercial and industrial environments operating up to 40°C.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic Protection, Bolt-On Connection
  • Voltage Rating: 480Y/277V AC
  • Current Rating: 125A
  • Dimensions: 5.66 in (143.76 mm) H x 2.94 in (74.68 mm) W x 4.05 in (102.87 mm) D
  • Standards: cULus, IEC
  • Applications: Commercial and Industrial Panelboards
  • Switch Type: Circuit Breaker
  • Configuration: Fixed
  • Phase: 3
  • Poles: 3
  • AIC Rating: 18kA @ 480V
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • Functions: LI (Long-Time and Instantaneous Trip)
  • Frame Size: 125A/EDB
  • Trip Type: Thermal Magnetic
  • Panel Type: NF Panelboard
  • Breaker Type: Standard
  • Temp Rating: 104 °F (40 °C)
  • Terminal Connection: Lug
  • Wire Size: AWG 12 to AWG 2/0 (Aluminum), AWG 14 to AWG 2/0 (Copper)
  • Certification: cULus, IEC
  • MCM Size: Min. 12 AWG (Al) / 14 AWG (Cu), Max. 2 AWG
  • Weight: 3.501 lb


Product Identification
  • UPC: 785901072966
  • GTIN: 00785901072966