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Square D HDA36125SK - Molded Case 125A 600V 3-Pole

Square D
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Square D HDA36125SK is a Powerpact H series molded case circuit breaker designed for overcurrent protection in industrial power distribution systems. This 3-pole, 3-phase thermal magnetic breaker is rated for 125A at 600VAC with an interrupting capacity of 18kA at 480VAC and features LI (Long-Time and Instantaneous) trip functions. The unit weighs 6 lb and utilizes I-Line style plug-in connection for secure mounting in compatible panelboards and switchboards. It is UL 489 Listed, CSA Certified, and IEC Rated, and is complete with a 24Vac shunt trip for remote tripping capability. Typical applications include feeder and branch circuit protection in manufacturing facilities, commercial buildings, and heavy industrial 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: 600VAC
  • Poles: 3
  • Connection: I-Line Style Plug-In
  • Protection: Thermal Magnetic
  • AIC rating: 25kA at 240VAC, 18kA at 480VAC, 14kA at 600VAC
  • Phase: 3
  • Current Rating: 125A
  • Additional Info: complete with 24Vac shunt trip
  • Series: PowerPacT H (HDA)
  • Amperage: 125A
  • Mounting: I-Line Plug-In
  • Trip Type: Thermal Magnetic with Long-Time and Instantaneous functions
  • Interrupting Rating: 25kA at 240VAC, 18kA at 480VAC, 14kA at 600VAC
  • Certifications: UL 489 Listed, CSA Certified, IEC Rated


Part Number: HDA36125SK