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Square D JJA36250U44X - Molded Case 250A 600V (LSIG Protection)

Square D
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Square D JJA36250U44X is a Powerpact J-Frame molded case circuit breaker designed for overcurrent protection in industrial power distribution systems. It is rated for 250A at 600VAC with a 65kA interrupting capacity at 480VAC and features a solid-state Micrologic electronic trip unit providing LSIG (Long-Time, Short-Time, Instantaneous, and Ground Fault) protection. This 3-pole, 3-phase AC breaker measures 7.5 in (191 mm) in height, 4.09 in (104 mm) in width, and 3.4 in (86 mm) in depth, weighing 7.12 lb, and connects via I-Line style plug-in with aluminum/copper lugs accepting wire sizes from 3/0 AWG to 350 kcmil. It complies with UL, CSA, NEMA, NOM-003-SCFI-2000, and IEC 60947-2 standards, operating within a temperature range of 28-158 °F (-2-70 °C). Typical applications include motor control centers, switchboards, and panelboards requiring reliable solid-state trip protection in commercial and industrial settings.

Key Features & Specifications
  • Type: Molded Case
  • Family: Powerpact
  • Frame Size: J
  • Current Rating: 250 A
  • Voltage Rating: 600 VAC
  • Poles: 3
  • Phase: 3
  • Phase Connection: AC
  • Protection: Solid State
  • Functions: LSIG - Long-Time, Short-Time, Instantaneous and Ground Fault
  • AIC rating: 65kA@480V
  • Connection: I-Line Style Plug-In
  • Terminal Connection: I-Line, Lug
  • Wire Size: AWG 3/0...350 kcmil aluminium/copper terminals
  • MCM Size: Min. Wire Size 3/0 AWG (Cu/Al) Max. Wire Size 350 kcmil (Cu/Al)
  • Dimensions: 7.5 in (191 mm) x 4.09 in (104 mm) x 3.4 in (86 mm) (Height x Width x Depth)
  • Weight: 7.12 lb
  • Temp Rating: 28-158 °F (-2-70 °C)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Certification: UL, CSA, NOM
  • Country of Origin: United States


Product Identification
  • UPC: 785901763017
  • GTIN: 00785901763017