MD125H - 125A Circuit Breaker

MD125H - 125A Circuit Breaker

The MD125H is a 125 amp, 2-pole Type MDH thermal magnetic circuit breaker for your main residential applications that require a plug-in configuration. Rated 120/240VAC with a 10k A.I.C. rating, it combines key details when matching a replacement: amperage, pole count, voltage, interrupting rating, connection style, and physical size. One feature deserves particular attention: the breaker has staggered lugs, with the wire entering the lug terminals perpendicular to the handle.

Key Features and Benefits

• 125 Amp Rating: Provides the specified 125A current rating for compatible residential applications requiring this exact breaker configuration.
• 2-Pole Design: The two-pole arrangement helps match the MD125H to existing equipment.
• 120/240VAC Rating: Clearly defined voltage information makes it easier to compare the breaker with the application's electrical requirements.
• Thermal-Magnetic Operation: Uses the supplied thermal-magnetic circuit breaker configuration.
• Plug-In Configuration: Identified as a plug-in breaker, another key detail when checking form and fit.
• Main Residential Application: Specified as a main residential circuit breaker for compatible equipment.
• Staggered Lug Arrangement: The MD125H has staggered lugs, with conductors entering the lug terminals perpendicular to the breaker handle's movement.
• Built to Last: Solid construction suits its intended electrical application when properly selected, installed, and maintained.

Technical Specifications

• Part Number: MD125H
  
• Product Type: Thermal Magnetic Circuit Breaker
  
• Application: Main Residential
  
• Type: MDH
  
• Configuration: Plug-In
  
• Amperes: 125A
  
• Poles: 2
  
• Voltage Rating: 120/240VAC
  
• A.I.C. Rating: 10k @ 120/240VAC
  
• Trip Type: Thermal Magnetic
  
• Lug Configuration: Staggered Lugs
  
• Wire Entry: Wire enters the lug terminals perpendicular to the action of the handle
  
• Height: 7.06 in.
  
• Width: 2.0 in.
  
• Depth: 3.25 in.
  
• Dimensions: 2.00"W x 7.06"L x 3.25"D
  
• Approx. Shipping Weight: 4.50 lbs.
  

Material Compliance and Certifications

The supplied specifications identify the staggered lug configuration and conductor-entry orientation, but they do not state the lug material, conductor range, terminal torque requirements, or other material details. Confirm these characteristics separately when they matter for the installation.

The manufacturer did not provide specific UL, IEC, RoHS, REACH, or other certification and material-compliance information for the MD125H. Do not assume compliance claims based on the product type or electrical ratings alone. Where a particular listing or material requirement applies, confirm it using appropriate product documentation.

Where It Works Best

The MD125H 125 amp circuit breaker is a practical replacement candidate for compatible residential equipment that specifically calls for a 2-pole, Type MDH, plug-in main breaker with thermal-magnetic operation, a 120/240VAC voltage rating, and a 10k A.I.C. rating.

The lug arrangement is particularly important here. This breaker uses staggered lugs, and the wire enters the lug terminals perpendicular to the action of the handle. That configuration should match the existing equipment and conductor routing requirements. Don't rely on amperage and voltage alone when determining fit.