MDA150 - 150 Amp Circuit Breaker

MDA150 - 150 Amp Circuit Breaker

Replacing your residential main breaker is one of those jobs where the small details matter just as much as the amp rating. The MDA150 is a 150-amp, 2-pole MD-A plug-in main residential thermal magnetic circuit breaker rated 120/240VAC with a 10k A.I.C. rating. An especially useful compatibility detail is the lug-terminal orientation: the wire enters the lug terminals parallel to the handle action. When those requirements match the existing equipment, the MDA150 can be considered a form, fit, and functional replacement candidate. Its solid construction is built to last when selected, installed, and maintained correctly.

Key Features and Benefits

• 150 Amp Rating: Rated at 150A for compatible residential main-breaker applications requiring this exact amperage.
• 2-Pole Configuration: The MDA150 uses a two-pole configuration and should be matched accordingly when replacing an existing breaker.
• 120/240VAC Rating: Clearly specified for 120/240VAC electrical applications.
• Thermal-Magnetic Circuit Breaker: Uses the specified thermal-magnetic trip configuration.
• Plug-In Design: The plug-in configuration is an important form-and-fit detail when identifying the correct replacement.
• Main Residential Application: Specifically identified as a main residential circuit breaker.
• Parallel Wire Entry: Conductors enter the lug terminals parallel to the handle action, a useful detail when comparing physical compatibility.

Technical Specifications

• Part Number: MDA150
  
• Product Type: Main Residential Thermal Magnetic Circuit Breaker
  
• Type: MD-A
  
• Amperes: 150A
  
• Poles: 2
  
• Voltage Rating: 120/240VAC
  
• A.I.C. Rating: 10k @ 120/240VAC
  
• Connection Style: Plug-In
  
• Application: Main Residential
  
• Trip Type: Thermal Magnetic
  
• Wire Entry Orientation: Wire enters the lug terminals parallel to the action of the handle
  
• Height: 6.31 in.
  
• Width: 2.0 in.
  
• Depth: 3.25 in.
  
• Dimensions: 2.00"W x 6.31"L x 3.25"D
  
• Approx. Ship Weight: 4.50 lbs.
  

Material Compliance and Certifications

The supplied MDA150 specifications did not include specific UL, IEC, RoHS, REACH, or other material-compliance or certification information. Because electrical equipment requires accurate product identification, do not assume those details from similar breakers or adjacent models. Verify any certification or material-compliance requirement for a particular installation separately using authoritative product documentation.

Where It Works Best

The MDA150 150 amp circuit breaker is intended for compatible residential electrical equipment requiring a 2-pole, 150A, 120/240VAC MD-A plug-in main breaker with a 10k A.I.C. rating. On replacement jobs, it's especially important to check the physical connection arrangement: this model is specified with wire entering the lug terminals parallel to the handle action.

For existing and legacy equipment, compare more than the part number. Check the MD-A type, amperage, pole count, voltage, A.I.C. rating, thermal magnetic configuration, plug-in design, dimensions, and lug-terminal wire-entry orientation against the installed breaker and the equipment requirements. If all of those specifications match, the MDA150 can serve as a form, fit, and functional replacement candidate. Qualified electrical personnel should confirm final compatibility and installation.