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Square D BDA34125Y - Molded Case Circuit Breaker 125A 3-Pole

Square D
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Square D BDA34125Y is a PowerPact B-Frame 125A 3-pole molded case circuit breaker designed for overcurrent protection in commercial and industrial power distribution systems. It is rated for 480Y/277VAC and 250VDC with an interrupting capacity of 18kA at 480V, featuring a thermal-magnetic trip unit that provides long time and instantaneous trip functions. The breaker measures 5.4 in (137 mm) in height, 3.2 in (81 mm) in width, and 3.5 in (89 mm) in depth, weighs 3.79 lb, and is constructed for I-Line mounting with aluminum mechanical lugs on the load end and I-Line connection on the line end. It complies with UL 489, CSA C22.2 No 5, NEMA AB1, EN/IEC 60947-2, and other international standards, with certifications including UL, IEC, CCC, EAC, CSA, and NOM. This circuit breaker is suitable for use in panelboards, switchgear, and industrial control panels requiring reliable overcurrent protection in three-phase systems.

Key Features & Specifications
  • Manufacturer: Schneider Electric
  • Family: Powerpact
  • Type: BDA
  • Frame Size: 125A/BD
  • Current Rating: 125A
  • Poles: 3
  • Phase: 3
  • Phase Connection: ABC
  • Voltage Rating: 480V
  • AIC rating: 18kA@480V
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Connection: I-Line
  • Terminal Connection: Al Mechanical Lug OFF End, I-Line ON End
  • Wire Size: AWG 14...AWG 2/0 aluminium/copper
  • MCM Size: Min. Wire Size 14 AWG Max. Wire Size 2 AWG
  • Dimensions: 5.4 in (137 mm) x 3.2 in (81 mm) x 3.5 in (89 mm) (Height x Width x Depth)
  • Weight: 3.79 lb
  • Temp Rating: -13–158 °F (-25–70 °C)
  • Standards: UL 489, GB 14048.2, NMX J-266, NEMA AB1, EN/IEC 60947-2, CSA C22.2 No 5, EN/IEC 60947-5-1
  • Certification: UL, IEC, CCC, EAC, CSA, NOM
  • Country of Origin: Mexico
  • Panel Type: Electrical Distribution Equipment, Industrial Control Panels
  • Breaker Type: Standard


Product Identification
  • UPC: 785901065869
  • GTIN: 00785901065869