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Square D BDA34125Y - Molded Case Circuit Breaker 125A 480V

Square D
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Square D BDA34125Y is a 3-pole molded case circuit breaker from the Powerpact family, designed for thermal-magnetic protection of electrical distribution equipment and industrial control panels. This 125A rated device operates at 480V with an 18kA interrupting capacity and features a 3-phase ABC connection, utilizing an I-Line connection on the load end and aluminum mechanical lugs on the line end. The breaker measures 5.4 in x 3.2 in x 3.5 in (137 mm x 81 mm x 89 mm), weighs 3.79 lb, and accepts wire sizes from 14 AWG to 2/0 AWG aluminum or copper. It complies with UL 489, CSA C22.2 No 5, EN/IEC 60947-2, NEMA AB1, and other international standards, with certifications including UL, IEC, CCC, EAC, CSA, and NOM. Typical applications include industrial control panels and electrical distribution equipment requiring long-time and instantaneous trip functions within a temperature range of -13°F to 158°F (-25°C to 70°C).

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Powerpact BDA, Thermal Magnetic
  • Voltage Rating: 480V
  • Current Rating: 125A
  • Dimensions: 5.4 in (137 mm) x 3.2 in (81 mm) x 3.5 in (89 mm) (Height x Width x Depth)
  • 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
  • Applications: Electrical Distribution Equipment, Industrial Control Panels
  • Switch Type: Standard
  • Configuration: I-Line Connection
  • Coil Voltage Maximum: Not Applicable
  • Temp Rating: -13°F to 158°F (-25°C to 70°C)
  • Shipping Dimensions: Not Specified
  • Phase: 3
  • Voltage: 480V
  • Amperage: 125A
  • AIC rating: 18kA@480V
  • Connection: I-Line
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: 125A/BD
  • Trip Type: Thermal Magnetic
  • Panel Type: Electrical Distribution Equipment, Industrial Control Panels
  • Breaker Type: Standard
  • Control Voltage Minimum: Not Applicable
  • Control Voltage Maximum: Not Applicable
  • MCM Size: Min. Wire Size 14 AWG, Max. Wire Size 2 AWG
  • Metal Type: Not Specified
  • Panel Style: Not Specified
  • Bus Type: Not Specified
  • Fuse Class: Not Applicable
  • Insulation Temperature: Not Specified
  • Inductance: Not Specified
  • Impedance: Not Specified
  • Barrels: Not Specified
  • Class Rating: Not Specified
  • Diameter: Not Specified
  • Velocity: Not Specified
  • Clip Center: Not Specified
  • Clas: Not Specified
  • Mounting: I-Line
  • Hz: Not Specified
  • Coil Material: Not Applicable
  • Horse Power: Not Specified
  • Aux Contacts: Not Specified
  • CPT: Not Specified
  • Full Load Amps: Not Specified
  • Dist Voltage: Not Specified
  • Bucket Size: Not Specified
  • Bucket Style: Not Specified
  • Bucket Type: Not Specified
  • Full Load Amp Maximum: Not Specified
  • Full Load Amp Minimum: Not Specified
  • Enclosure: Not Specified
  • Relay Style: Not Specified
  • Coil Voltage Minimum: Not Applicable
  • Wire: Not Specified
  • Amperage Maximum: 125A
  • Amperage Minimum: Not Specified
  • Nema Rating: Not Specified
  • Switch Style: Standard
  • Wire Size: AWG 14...AWG 2/0 aluminium/copper
  • Certification: UL, IEC, CCC, EAC, CSA, NOM
  • Circuit Breaker Mounting Style: I-Line
  • Terminal Connection: Al Mechanical Lug OFF End, I-Line ON End
  • Frequency Rating: Not Specified
  • Phase Connection: ABC
  • 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
  • Compatible Frames: 125A/BD
  • Installation Type: I-Line
  • Item QTY: Not Specified
  • Nema Starter Size: Not Specified
  • Breaker Frame: BD
  • Current Rating: 125A
  • Reverse Standoff Voltage: Not Applicable
  • Watts: Not Specified
  • Peak Pulse Current: Not Applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not Applicable
  • Breakdown Voltage (VBR@IT) (V): Not Applicable
  • Polarity: Not Applicable
  • Operating Temperature Maximum Celsius: 70°C
  • Max Clamp Voltage: Not Applicable
  • On-State Current: Not Applicable


Product Identification
  • UPC: 785901065869
  • GTIN: 00785901065869