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Square D BJA261251 - 2-Pole 125A 600V Molded Case Circuit Breaker

Square D
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The Square D BJA261251 is a 2-pole molded case circuit breaker from the Powerpact family, designed to provide thermal-magnetic protection for electrical distribution equipment and industrial control panels. It is rated for 600V AC, 125A, with a 65kA interrupting capacity at 480V, and features a 1-phase, AB phase connection. The breaker 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 uses an I-Line style plug-in connection with aluminum mechanical lugs on the load end and I-Line connection 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, EN/IEC 60947-2, and other international standards, with certifications including UL, IEC, CCC, EAC, CSA, and NOM, and operates within a temperature range of -13°F to 158°F (-25°C to 70°C). This breaker is suitable for industrial applications requiring reliable overcurrent protection with long-time and instantaneous trip functions.

Key Features & Specifications
  • Type: Molded Case, Powerpact BJA, Thermal Magnetic Protection
  • Voltage Rating: 600V AC
  • Current Rating: 125A
  • 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, EN/IEC 60947-2, GB 14048.2, NMX J-266, NEMA AB1
  • Applications: Electrical Distribution Equipment, Industrial Control Panels
  • Switch Type: Circuit Breaker
  • Configuration: 2-Pole, 1-Phase
  • Coil Voltage Maximum: N/A
  • Temp Rating: -13°F to 158°F (-25°C to 70°C)
  • Shipping Dimensions: N/A
  • Phase: 1
  • Voltage: 600V
  • Amperage: 125A
  • 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: N/A
  • Control Voltage Maximum: N/A
  • MCM Size: Min. Wire Size 14 AWG, Max. Wire Size 2 AWG
  • Metal Type: N/A
  • Panel Style: N/A
  • Bus Type: N/A
  • Fuse Class: N/A
  • Insulation Temperature: N/A
  • Inductance: N/A
  • Impedance: N/A
  • Barrels: N/A
  • Class Rating: N/A
  • Diameter: N/A
  • Velocity: N/A
  • Clip Center: N/A
  • Clas: N/A
  • Mounting: I-Line Plug-In
  • Hz: N/A
  • Coil Material: N/A
  • Horse Power: N/A
  • Aux Contacts: N/A
  • CPT: N/A
  • Full Load Amps: N/A
  • Dist Voltage: N/A
  • Bucket Size: N/A
  • Bucket Style: N/A
  • Bucket Type: N/A
  • Full Load Amp Maximum: N/A
  • Full Load Amp Minimum: N/A
  • Enclosure: N/A
  • Relay Style: N/A
  • Coil Voltage Minimum: N/A
  • Wire: N/A
  • Amperage Maximum: N/A
  • Amperage Minimum: N/A
  • Nema Rating: N/A
  • Switch Style: N/A
  • 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: N/A
  • Phase Connection: AB
  • Standards: CSA C22.2 No 5, EN/IEC 60947-5-1, UL 489, GB 14048.2, NMX J-266, NEMA AB1, EN/IEC 60947-2
  • Compatible Frames: N/A
  • Installation Type: Plug-In
  • Item QTY: 1
  • Nema Starter Size: N/A
  • Breaker Frame: 125A/BJ
  • Current Rating: 125A
  • Reverse Standoff Voltage: N/A
  • Watts: N/A
  • Peak Pulse Current: N/A
  • Breakdown Voltage (MIN VBR@IT ) (V): N/A
  • Breakdown Voltage (VBR@IT) (V): N/A
  • Polarity: N/A
  • Operating Temperature Maximum Celsius: 70°C
  • Max Clamp Voltage: N/A
  • On-State Current: N/A


Product Identification
  • UPC: 785901058816
  • GTIN: 00785901058816