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Square D HDA36125UD - 125A 3-Pole Molded Case Breaker (600V AC)

Square D
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Square D HDA36125UD is a 3-pole molded case circuit breaker from the Powerpact family, designed for overcurrent protection in industrial and commercial power distribution systems. It is rated for 125A at 600V AC and provides thermal magnetic protection with LI (Long-Time and Instantaneous) trip functions. This unit weighs 6 lb and features an I-Line style plug-in connection for direct mounting in Class 612 panelboards and switchboards. It carries a 18kA interrupting capacity at 480V AC and is UL Listed and CSA Certified. The breaker is suited for 3-phase applications requiring reliable circuit protection in demanding environments.

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: 600V AC
  • Poles: 3
  • Connection: I-Line Style Plug-In
  • Protection: Thermal Magnetic
  • AIC rating: 18kA @ 480V
  • Phase: 3
  • Current Rating: 125A
  • Amperage: 125A
  • Mounting Type: Plug-On
  • Interrupt Rating: 18kA @ 480V
  • Series/Frame: HDA
  • Trip Unit: Thermal Magnetic, LI (Long-Time and Instantaneous)
  • Certifications: UL Listed, CSA Certified
  • Application: Class 612 I-Line Panelboard/Switchboard
  • Breaking Capacity Code: D


HDA36125UD