HMA3125 - 125Amp Circuit Breaker

HMA3125 - 125Amp Circuit Breaker

When you’re replacing a breaker in existing electrical equipment, the small details can be just as important as the amp rating. The HMA3125 is a 125-amp, 3-pole Type HMA thermal-magnetic circuit breaker with an interchangeable trip unit and load-side terminals included. It’s rated 25k AIC at 600VAC, 35k AIC at 480VAC, and 65k AIC at 240VAC, along with a 40°C temperature rating. The breaker measures approximately 8.25"W x 16.00"L x 4.00" D and weighs about 46 lbs. for shipping. Those specifications make it easier to compare the HMA3125 directly with an existing breaker when working on compatible electrical equipment.

Key Features and Benefits

• 125 Amp, 3-pole design for compatible electrical distribution applications
• Type HMA configuration helps with accurate replacement identification
• Thermal magnetic circuit breaker with an interchangeable trip unit
• 40°C rated as specified for this breaker
• Load-side terminals included
• Measures approximately 8.25"W x 16.00"L x 4.00"D
• Useful for maintaining compatible existing and legacy electrical equipment
• Designed for applications where matching the original form, fit, and function matters
  

Technical Specifications

• Part Number: HMA3125
  
• Product Type: Thermal Magnetic Circuit Breaker
  
• Type: HMA
  
• Amperage: 125 Amps
  
• Poles: 3
  
• Temperature Rating: 40°C
  
• A.I.C. @ 600VAC: 25k AIC
  
• A.I.C. @ 480VAC: 35k AIC
  
• A.I.C. @ 240VAC: 65k AIC
  
• Trip Unit: Interchangeable
  
• Terminals: Load-Side Terminals Included
  
• Height / Length: 16.00 in.
  
• Width: 8.25 in.
  
• Depth: 4.00 in.
  
• Dimensions: 8.25"W x 16.00"L x 4.00"D
  
• Approx. Shipping Weight: 46.00 lbs.
  

Material Compliance and Certifications

Specific material compliance and certification information was not included in the supplied specifications for the HMA3125. Because of that, UL, CSA, RoHS, or other listings and certifications shouldn’t be assumed from the part number alone.

If a particular certification or compliance standard is required for the installation, check the breaker markings and the applicable technical documentation before use.

Where It Works Best

The HMA3125 125 Amp circuit breaker is a good fit for maintenance and replacement work involving compatible electrical equipment designed around a Type HMA 3-pole thermal-magnetic breaker. It’s particularly relevant in legacy systems where the goal is to keep the original breaker configuration intact.