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Square D BJA260401 - 2-Pole 40A Molded Case Circuit Breaker

Square D
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Square D BJA260401 is a 2-pole molded case circuit breaker from the Powerpact family, designed for thermal-magnetic protection in electrical distribution equipment and industrial control panels. It is rated for 600V AC, 40A continuous current, and provides a 65kA interrupting capacity at 480V AC, with long time and instantaneous trip functions. The unit measures 5.4 in x 2.1 in x 3.5 in (137 mm x 54 mm x 89 mm), weighs 1.9 lb, and features an I-Line style plug-in connection with aluminum mechanical lugs on the load end and I-Line on the line end, accepting wire sizes from 14 AWG to 2/0 AWG aluminum/copper. It complies with UL 489, CSA C22.2 No 5, IEC 60947-2, NEMA AB1, GB 14048.2, and NMX J-266 standards, with certifications from UL, IEC, CCC, EAC, CSA, and NOM, and operates within a temperature range of -25°C to 70°C (-13°F to 158°F). This circuit breaker is suitable for single-phase applications in industrial power distribution systems requiring reliable overcurrent protection.

Key Features & Specifications
  • Type: Molded Case, Thermal Magnetic
  • Voltage Rating: 600V AC
  • Current Rating: 40A
  • Dimensions: 5.4 in (137 mm) x 2.1 in (54 mm) x 3.5 in (89 mm) (Height x Width x Depth)
  • Standards: UL 489, CSA C22.2 No 5, IEC 60947-2, NEMA AB1, GB 14048.2, NMX J-266, EN/IEC 60947-5-1
  • Applications: Electrical Distribution Equipment, Industrial Control Panels
  • Switch Type: Standard Breaker
  • Configuration: 2-Pole, 1-Phase
  • Coil Voltage Maximum: Not applicable (thermal magnetic)
  • Temp Rating: -25–70 °C (-13–158 °F)
  • Shipping Dimensions: Not specified
  • Phase: 1
  • Voltage: 600V
  • Amperage: 40A
  • AIC rating: 65kA@480V
  • Connection: I-Line Style Plug-In
  • Poles: 2
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: 125A/BJ
  • 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 applicable
  • Impedance: Not applicable
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Plug-In
  • Hz: 50/60 Hz (assumed from standards)
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: 40A
  • Dist Voltage: 600V
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 40A
  • Full Load Amp Minimum: 40A
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: AWG 14...AWG 2/0 aluminium/copper
  • Amperage Maximum: 40A
  • Amperage Minimum: 40A
  • 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: Plug-In
  • Terminal Connection: Al Mechanical Lug OFF End, I-Line ON End
  • Frequency Rating: 50/60 Hz (assumed)
  • Phase Connection: AB
  • Standards: GB 14048.2, NMX J-266, NEMA AB1, EN/IEC 60947-5-1, CSA C22.2 No 5, UL 489, EN/IEC 60947-2
  • Compatible Frames: 125A/BJ
  • Installation Type: Plug-In
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: 125A/BJ
  • Current Rating: 40A
  • 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: 785901058373
  • GTIN: 00785901058373