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Square D QJA221252 - Molded Case Circuit Breaker 125A 240V

Square D
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The Square D QJA221252 is a molded case circuit breaker from Schneider Electric's I-Line family, designed for thermal magnetic protection in industrial power distribution systems. It operates at 240V with a 125A current rating and a 100kA interrupting capacity at 240V, providing LI (Long Time and Instantaneous) protection functions. This 2-pole, 1-phase breaker features an I-Line style plug-in connection, measures 6.47 in x 3 in x 3.93 in (164.34 mm x 76.2 mm x 99.82 mm), and weighs 4.663 lb, with an operating temperature range of -13°F to 158°F (-25°C to 70°C). It complies with UL, CSA, NEMA, and NOM-003-SCFI-2000 standards, with certifications from UL, CSA, and NOM. Typical applications include branch circuit protection in commercial and industrial panelboards, switchboards, and motor control centers.

Key Features & Specifications
  • Type: Molded Case, Thermal Magnetic, I-Line Plug-In
  • Voltage Rating: 240V
  • Current Rating: 125A
  • Dimensions: 6.47 in x 3 in x 3.93 in (164.34 mm x 76.2 mm x 99.82 mm)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000
  • Applications: Branch circuit protection in panelboards, switchboards, motor control centers
  • Switch Type: Circuit Breaker
  • Configuration: 2-Pole
  • Coil Voltage Maximum: Not applicable (thermal magnetic)
  • Temp Rating: -13°F to 158°F (-25°C to 70°C)
  • Shipping Dimensions: 6.47 in x 3 in x 3.93 in
  • Phase: 1
  • Voltage: 240V
  • Amperage: 125A
  • AIC rating: 100kA@240V
  • Connection: I-Line Style Plug-In
  • Poles: 2
  • Protection: Thermal Magnetic
  • Functions: LI - Long Time and Instantaneous
  • Frame Size: QJA
  • Trip Type: Thermal Magnetic
  • Panel Type: I-Line
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not specified
  • Metal Type: Not specified
  • Panel Style: I-Line
  • Bus Type: I-Line
  • 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 (typical)
  • 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 applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: Not specified
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 125A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Circuit Breaker
  • Wire Size: Not specified
  • Certification: UL, CSA, NOM
  • Circuit Breaker Mounting Style: Plug-In
  • Terminal Connection: I-Line
  • Frequency Rating: 50/60 Hz (typical)
  • Phase Connection: 1-Phase
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000
  • Compatible Frames: I-Line
  • Installation Type: Plug-In
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: QJA
  • 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: 785901871897