Q2M3100MB - 100 Amp Circuit Breaker

Q2M3100MB - 100 Amp Circuit Breaker

When you're replacing a circuit breaker in existing equipment, getting the details right matters. The Q2M3100MB is a 100-amp, 3-pole thermal-magnetic circuit breaker with a 10k AIC rating at 240VAC. It's a Type Q2MB breaker with a non-interchangeable trip unit, 1/4-20" studs on the line side, and lug terminals on the load side.

The breaker measures 6.5" high, 4.5" wide, and 3.13" deep, making those dimensions worth checking against the existing installation before replacement. It's particularly useful for maintaining legacy electrical equipment that was designed around this specific breaker style. Rather than changing the equipment configuration, the goal is straightforward: match the required amperage, pole count, voltage, interrupting rating, physical size, and terminal arrangement. For systems that specify the Q2M3100MB, this breaker provides the familiar form, fit, and function needed to keep existing equipment in service. It's built to last when properly installed and used within its stated electrical ratings.

Key Features and Benefits

• 100-amp rating for equipment requiring a 100-amp breaker.
• Three-pole design for compatible three-pole electrical applications.
• Thermal-magnetic operation provides overcurrent protection appropriate to its intended application.
• Rated 10k AIC at 240VAC.
• Type Q2MB configuration for matching compatible existing equipment.
• Uses a non-interchangeable trip unit.
• 1/4-20" studs on the line side provide the specified line connection.
• Lug terminals on the load side match applications designed for this connection style.
• Clearly defined dimensions make it easier to compare the breaker with the unit being replaced.
• Well suited to legacy equipment maintenance and replacement applications where matching the original specifications is important.
• Built to last when correctly applied within its specified ratings.

Technical Specifications

• Part Number: Q2M3100MB
  
• Type: Q2MB
  
• Breaker Type: Thermal Magnetic
  
• Trip Unit: Non-Interchangeable
  
• Amperage: 100A
  
• Poles: 3
  
• AIC Rating: 10k
  
• Voltage: 240VAC
  
• AIC Rating & Voltage: 10k @ 240VAC
  
• Height: 6.5 in.
  
• Width: 4.5 in.
  
• Depth: 3.13 in.
  
• Line Side: 1/4-20" Studs
  
• Load Side: Lug Terminals
  

Material Compliance and Certifications

• Material compliance details and certification information were not provided with the available specifications for the Q2M3100MB. If your application requires a specific agency listing, certification, or material compliance standard, check the markings on the breaker itself and the applicable technical documentation before installation. This avoids assuming that a certification applies when it hasn't been confirmed for the specific unit.

Where It Works Best

• The Q2M3100MB is best suited to existing and legacy electrical equipment that requires its specific Q2MB configuration. It can be a good fit for maintenance and replacement work where the required breaker is 100 amps, three-pole, and rated at 10k AIC at 240VAC.
  Connection style is just as important as the electrical ratings. This model has 1/4-20" line-side studs and load-side lug terminals, so those details should be checked carefully against the breaker being replaced.