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Square D HJA36125UJYP - Molded Case Circuit Breaker 125A 600V 3-Pole

Square D
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Square D HJA36125UJYP is a Powerpact HJA molded case circuit breaker designed for reliable overcurrent protection in industrial and commercial power distribution systems. It is rated for 125A at 600VAC with a 3-pole configuration and features a thermal magnetic trip unit providing LI (Long-Time and Instantaneous) functions for coordinated protection. The breaker utilizes an I-Line style plug-on mounting for direct connection to Class 612 bus systems, weighs 12.5 lb, and supports wire sizes from 14 to 3/0 AWG. It delivers an interrupting capacity of 65kA at 480V and 25kA at 600VAC, is UL Listed for safety compliance, and is suitable for reverse-fed applications. This unit is commonly deployed in 3-phase panelboards and switchboards for motor, feeder, and branch circuit protection in demanding environments.

Key Features & Specifications
  • Manufacturer: Square D
  • Series/Frame: Powerpact HJA
  • Item Subcategory: Molded Case
  • Amperage Rating: 125A
  • Voltage Rating: 600VAC
  • Number of Poles: 3
  • Phase: 3 Phase
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Connection: I-Line Style Plug-On
  • Mounting Type: Plug-On (I-Line)
  • Interrupt Rating: 65kA at 480V; 25kA at 600VAC
  • Weight: 12.5 lb
  • Wire Size: 14 to 3/0 AWG
  • Trip Range: 900A Hold, 1700A Trip
  • Certifications: UL Listed


Part Number: HJA36125UJYP