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HDA36125UO

Square D
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Square D HDA36125UO is a 3-pole molded case circuit breaker from the Powerpact HDA family, designed for reliable overload and short-circuit protection in commercial and industrial power distribution systems. It carries a 125A current rating at 600VAC with an 18kA interrupting capacity at 480V, utilizing a thermal magnetic trip unit providing LI (Long-Time and Instantaneous) functions. The breaker features an I-Line style plug-in connection for Class 612 panelboards or switchboards, weighs 6 lb, and is built for 3-phase ABC phase connection with compatibility for reverse fed applications. It is UL Listed and CSA Certified, ensuring compliance with North American safety standards. This breaker is suitable for demanding environments requiring dependable circuit protection in panelboards and switchboards.

Key Features & Specifications
  • Manufacturer: Square D
  • Item Subcategory: Molded Case
  • Family: Powerpact
  • Type: HDA
  • Weight: 6 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600VAC
  • Poles: 3
  • Connection: I-Line Style Plug-In
  • Protection: Thermal Magnetic
  • AIC Rating: 18kA@480V
  • Phase: 3
  • Current Rating: 125A
  • Mounting: Plug-on
  • Phase Connection: ABC
  • Reverse Fed Compatible: Yes
  • UL Listed
  • CSA Certified


Square D HDA36125UO - Molded Case Circuit Breaker 125A 600V