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Square D HJA36125UD - Molded Case 125A 600V 3-Pole

Square D
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Square D HJA36125UD is a Powerpact molded case circuit breaker designed for reliable overload and short-circuit protection in industrial and commercial power distribution systems. This 3-pole, 125A unit is rated for 600V and 3-phase applications, featuring a thermal magnetic trip unit with LI (Long-Time and Instantaneous) functions for precise protection. The breaker utilizes an I-Line style plug-in connection with a compact H-frame design, supports wire sizes from AWG 14 to AWG 3/0, and is rated for 80% continuous current. It offers a robust interrupting capacity of 65kA at 480V and is suitable for reverse-fed applications. Typical applications include main or feeder protection in switchboards, panelboards, and motor control centers within industrial facilities.

Key Features & Specifications
  • Manufacturer: Square D
  • Series/Frame: Powerpact HJA
  • Type: HJA
  • Amperage: 125A
  • Voltage: 600V
  • Poles: 3
  • Phase: 3-Phase
  • Mounting Type: I-Line Plug-In
  • Connection: ABC Phase
  • Trip Unit: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Interrupt Rating: 65kA @ 480V
  • Continuous Current Rating: 80%
  • Weight: 5 lb
  • Wire Size: AWG 14 to AWG 3/0


Part Number: HJA36125UD