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Square D JJA36250U43X - Molded Case Circuit Breaker 250A 600V 3P

Square D
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The Square D JJA36250U43X is a Powerpact J-frame molded case circuit breaker designed to provide reliable overcurrent and short-circuit protection for three-phase industrial power distribution systems. It features a solid-state LSI (Long Time, Short Time, Instantaneous) trip unit with a 250A current rating and a 600V voltage rating, housed in a compact unit measuring 191 mm H x 104 mm W x 86 mm D (7.5" x 4.09" x 3.4") and weighing 5 lb. This breaker is compliant with UL, CSA, NEMA, NOM, and IEC 60947-2 standards and is engineered for use in panelboards and switchboards, offering a 65kA interrupting capacity at 480V for robust fault protection.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Solid State Protection, I-Line Style Plug-In Connection
  • Voltage Rating: 600V AC
  • Current Rating: 250A
  • Dimensions: 191 mm H x 104 mm W x 86 mm D (7.5 in x 4.09 in x 3.4 in)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial Power Distribution, Panelboards, Switchboards
  • Switch Type: Circuit Breaker
  • Configuration: 3-Pole
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • Phase: 3
  • Amperage: 250A
  • AIC rating: 65kA @ 480V
  • Connection: I-Line, Lug
  • Poles: 3
  • Protection: Solid State Trip Unit
  • Functions: LSI (Long Time, Short Time, Instantaneous)
  • Frame Size: J
  • Wire Size: 3/0 AWG to 350 kcmil (Aluminium/Copper)
  • Certification: UL, CSA, NOM
  • MCM Size: Min. 3/0 AWG, Max. 350 kcmil
  • Terminal Connection: I-Line, Lug
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-Phase
  • Compatible Frames: Powerpact J-Frame
  • Installation Type: Plug-In
  • Breaker Frame: J
  • Operating Temperature Maximum Celsius: 70 °C


Product Identification
  • UPC: 785901084280
  • GTIN: 00785901084280