Q2M3150MT - 150 Amp Circuit Breaker

Q2M3150MT - 150 Amp Circuit Breaker

When you're replacing a breaker in older electrical equipment, the small details matter just as much as the amp rating. The Q2M3150MT is a 150-amp, 3-pole thermal-magnetic circuit breaker with a 10k AIC rating at 240 VAC. It is a Q2MT type breaker and uses a non-interchangeable trip unit. Connection points are different on each side: you'll find lug terminals on the line side and 1/4-20" studs on the load side. The breaker measures 6.5" high, 4.5" wide, and 3.13" deep. If you're trying to match a breaker already installed in legacy equipment, these details are worth checking carefully. Don't rely on the 150A rating alone—the part number, number of poles, voltage and interrupting ratings, terminal style, and physical size should all align with the equipment's requirements. For applications designed around this configuration, the Q2M3150MT provides the form, fit, and function needed to keep compatible equipment in service. It's built to last when used within its specified ratings and installed and maintained correctly.

Key Features and Benefits

• 150-amp rating for applications designed around a 150-amp breaker.
• Three poles for compatible three-pole electrical systems.
• Thermal magnetic trip operation provides overload and short-circuit protection within the breaker's specified ratings.
• 10k AIC at 240VAC interrupting rating.
• Q2MT type for equipment requiring this particular breaker configuration.
• Non-interchangeable trip unit, an important point to verify when matching an existing breaker.
• Lug terminals on the line side with 1/4-20" studs on the load side.
• Compact 6.5" x 4.5" x 3.13" footprint for applications designed around these dimensions.
• Built to last when correctly matched, installed, and maintained.

Technical Specifications

• Part Number: Q2M3150MT
  
• Type: Q2MT
  
• Breaker Type: Thermal Magnetic
  
• Amperage: 150A
  
• Poles: 3
  
• A.I.C. Rating: 10k
  
• Voltage: 240VAC
  
• Trip Unit: Non-Interchangeable
  
• Line Side: Lug Terminals
  
• Load Side: 1/4-20" Studs
  
• Height: 6.5 in.
  
• Width: 4.5 in.
  
• Depth: 3.13 in.
  

Material Compliance and Certifications

• Specific certification, agency listing, and material-compliance information was not provided with the available specifications for the Q2M3150MT, so no additional certifications should be assumed. If your application requires a particular listing or compliance standard, check the markings on the breaker and the applicable technical documentation before installation.

Where It Works Best

• The Q2M3150MT circuit breaker is best suited to compatible legacy electrical equipment that requires this specific Q2MT configuration. It's particularly useful in replacement situations where maintaining the original 150A, 3-pole, 240VAC configuration and terminal arrangement is important.