HMA3125T - 125Amp Trip Unit

HMA3125T - 125Amp Trip Unit

When you’re replacing a trip unit in existing electrical equipment, getting the specifications right is what matters. The HMA3125T is a 125-amp, 3-pole thermal-magnetic trip unit designed for compatible MA and HMA frames. Measuring approximately 4.00 inches wide, 7.50 inches long, and 3.50 inches deep, the HMA3125T is suited to applications where the existing equipment calls for this particular size, amperage, pole configuration, and trip characteristics. It’s a straightforward replacement option for maintaining the intended form, fit, and function of compatible legacy electrical equipment—and it’s built to last in the applications it was designed to serve.

Key Features and Benefits

• 125 Amp, 3-pole configuration for compatible MA and HMA frame applications
• Thermal magnetic operation designed specifically for MA and HMA frames
• Magnetic Hi-Low trip setting range of 625–1250
• Compact footprint makes it easier to compare against an existing unit during replacement
• Well suited to maintenance work involving compatible existing and legacy electrical equipment
• Helps retain the intended form, fit, and function when specifications are properly matched
  

Technical Specifications

• Part Number: HMA3125T
  
• Type: HMA
  
• Amperage: 125 Amps
  
• Poles: 3
  
• Trip Type: Thermal Magnetic
  
• Frame Application: MA & HMA
  
• Magnetic Trip Setting Range: 625–1250
  
• Width: 4.00 in.
  
• Height / Length: 7.50 in.
  
• Depth: 3.50 in.
  
• Overall Dimensions: 4.00"W x 7.50"L x 3.50"D
  
• Approx. Shipping Weight: 6.00 lbs.
  

Material Compliance and Certifications

No specific material-compliance information or certification details were included in the available specifications for the HMA3125T. Because of that, certifications or listings such as UL, CSA, or RoHS should not be assumed.

If your installation has specific code, certification, or material requirements, check the markings on the actual unit and the documentation associated with the equipment before installation.

Where It Works Best

The HMA3125T makes the most sense for maintaining or repairing an existing electrical distribution system that uses a compatible MA or HMA frame and requires a 125-amp, 3-pole thermal-magnetic trip unit with the stated ratings.

It can be a practical fit for legacy equipment where keeping the original electrical and physical configuration is important. Rather than choosing a replacement based on amperage alone, check the complete set of specifications. The frame type, number of poles, trip characteristics, voltage and AIC ratings, magnetic trip range, and physical dimensions should all agree with the requirements of the existing equipment.