HGA36125 - 125 Amp Circuit Breaker

HGA36125 - 125 Amp Circuit Breaker

The HGA36125 PowerPacT H circuit breaker is a 125-amp, 3-pole breaker designed for your electrical distribution systems that need dependable thermal-magnetic protection. It helps protect against overloads and short circuits and is rated 18 kA at 600VAC, with additional UL 489 interrupting ratings of 35 kA at 480VAC and 65 kA at 240VAC. In compatible I-Line equipment, the setup is simple: I-Line connection on the line side, mechanical lugs on the load side. The breaker also uses dual-break rotating contacts to help reduce peak current during short-circuit conditions.

Key Features and Benefits

• 125A, 3-pole design – Built for three-pole distribution applications that require a 125-amp breaker.
• Thermal-magnetic trip protection – Provides overload and short-circuit protection without an electronic trip unit.
• 18 kA at 600VAC – Also rated 35 kA at 480VAC and 65 kA at 240VAC under UL 489.
• I-Line configuration – Designed for compatible I-Line equipment, with mechanical lugs on the load side.
• Dual-break rotating contacts – Helps limit peak current during a short-circuit fault.
• Push-to-trip button – Gives qualified technicians a simple manual trip function.
• 80% continuous-current rating – Configured with an ABC phase connection.
• Wide conductor range – AL150HD terminals accept 14 AWG through 3/0 AWG aluminum or copper conductors.
  

Technical Specifications

• Catalog Number: HGA36125
  
• Product Family: PowerPacT H
  
• Product Type: Circuit Breaker
  
• Rated Current: 125 A
  
• Number of Poles: 3
  
• Protected Poles: 3t
  
• Trip Technology: Thermal-magnetic
  
• Control Type: Toggle
  
• Breaking Capacity at 240VAC: 65 kA, 50/60 Hz, UL 489
  
• Breaking Capacity at 480VAC: 35 kA, 50/60 Hz, UL 489
  
• Breaking Capacity at 600VAC: 18 kA, 50/60 Hz, UL 489
  
• Breaking Capacity at 250VDC: 20 kA, UL 489
  
• Breaking Capacity at 500VDC: 20 kA, UL 489
  
• Rated Operational Voltage: 690VAC, 50/60 Hz, IEC 60947-3
  
• Rated Insulation Voltage: 750 V
  
• Impulse Withstand Voltage: 8 kV
  
• Network Frequency: 50/60 Hz
  
• Magnetic Tripping Current: 1700 A
  
• Magnetic Hold Current: 900 A
  
• Continuous Current Rating: 80%
  
• Suitability for Isolation: Yes, IEC 60947-2
  
• Utilization Category: Category A
  
• Phase Connection: ABC
  
• Mounting: I-Line bracket
  
• Line-Side Connection: I-Line
  
• Load-Side Connection: Mechanical lugs
  
• Height: 6.4 in. (163 mm)
  
• Width: 4.09 in. (104 mm)
  
• Depth: 3.4 in. (86 mm)
  
• Product Weight: 4.9 lb. (2.2 kg)
  

Material Compliance and Certifications

The HGA36125 carries UL, CSA, and NOM certifications and is CE marked. It also meets applicable UL, CSA, NEMA, NOM-003-SCFI-2000, and IEC 60947-2 standards. The front cover is rated IP40 under IEC 60529, and the breaker is classified for Pollution Degree 3 under IEC 60947-1.

Where It Works Best

The HGA36125 is a good fit for commercial, industrial, institutional, and facility electrical systems that use compatible I-Line equipment. It is especially useful where the application calls for a 125A, 3-pole thermal-magnetic breaker with an 18 kA interrupting rating at 600VAC.