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Square D HJA36125SJ - Molded Case 125A 600V (3-Pole)

Square D
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Square D HJA36125SJ is a Powerpact H-Frame molded case circuit breaker designed for overcurrent protection in commercial and industrial power distribution systems. This 3-pole, 125A unit is rated for 600V and delivers a 65kA interrupting capacity at 480V, utilizing thermal magnetic protection with LI (Long-Time and Instantaneous) trip functions. The breaker features an I-Line style plug-in connection for secure panel mounting and weighs 5 lb, and it is complete with a 525/600Vac shunt trip for remote tripping capability. It is UL listed and suitable for reverse fed applications, meeting industry standards for reliability in demanding electrical environments. Typical applications include main and feeder circuits in manufacturing facilities, data centers, and commercial buildings requiring high fault current protection.

Key Features & Specifications
  • Type: Molded Case
  • Family: Powerpact
  • Type: HJA
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Current Rating: 125A
  • Poles: 3
  • Phase: 3
  • Connection: I-Line Style Plug-In
  • Protection: Thermal Magnetic
  • AIC rating: 65kA@480V
  • Weight: 5 lb
  • Additional Info: complete with 525/600Vac shunt trip
  • Certifications: UL Listed


Part Number: HJA36125SJ