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Square D JJA36250U31X - 250A 3-Pole Molded Case Circuit Breaker

Square D
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Square D JJA36250U31X is a 250A, 3-pole molded case circuit breaker from the Powerpact family, designed to protect electrical systems from overloads and short circuits using solid-state Micrologic 3.2 trip technology with long time and instantaneous trip functions. It operates at 600VAC, 3-phase, with a 65kA interrupting capacity at 480VAC, and accepts wire sizes from 3/0 AWG to 350 kcmil (copper or aluminum) via I-Line style plug-in connection with lugs. The breaker measures 7.5 in (191 mm) in height, 4.09 in (104 mm) in width, and 3.4 in (86 mm) in depth, weighs 7.12 lb, and is rated for ambient temperatures from 28 to 158 °F (-2 to 70 °C). It complies with UL, CSA, NEMA, NOM-003-SCFI-2000, and IEC 60947-2 standards, and is certified by UL, CSA, and NOM. This circuit breaker is suitable for industrial applications requiring reliable overcurrent protection in I-Line panelboards and switchboards.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Powerpact J-Frame, Solid State Protection
  • Voltage Rating: 600VAC
  • Current Rating: 250A
  • Dimensions: 7.5 in (191 mm) x 4.09 in (104 mm) x 3.4 in (86 mm) (Height x Width x Depth)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial power distribution, motor protection, feeder circuits
  • Switch Type: I-Line Plug-In
  • Configuration: 3-Pole
  • Coil Voltage Maximum: Not applicable (solid state trip)
  • Temp Rating: 28-158 °F (-2-70 °C)
  • Shipping Dimensions: 7.5 in x 4.09 in x 3.4 in
  • Phase: 3
  • Voltage: 600V
  • Amperage: 250A
  • AIC rating: 65kA@480V
  • Connection: I-Line Style Plug-In
  • Poles: 3
  • Protection: Solid State
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: J
  • Trip Type: Micrologic 3.2
  • Panel Type: I-Line
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Min. 3/0 AWG, Max. 350 kcmil (Cu/Al)
  • Metal Type: Not specified
  • Panel Style: I-Line
  • Bus Type: I-Line
  • Fuse Class: Not applicable
  • Insulation Temperature: Not specified
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: I-Line Plug-In
  • Hz: 50/60 Hz
  • 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: 3/0 AWG to 350 kcmil (Cu/Al)
  • Amperage Maximum: 250A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: I-Line
  • Wire Size: 3/0 AWG to 350 kcmil (Cu/Al)
  • Certification: UL, CSA, NOM
  • Circuit Breaker Mounting Style: I-Line Plug-In
  • Terminal Connection: I-Line, Lug
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-Phase
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Compatible Frames: J-Frame
  • Installation Type: Plug-In
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: J
  • Current Rating: 250A
  • 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: 785901159117
  • GTIN: 00785901159117