MP2125 - 125 Amp Circuit Breaker

MP2125 - 125 Amp Circuit Breaker

Finding the right breaker for your existing electrical equipment comes down to matching the details, not just choosing something that looks similar. The Siemens MP2125 circuit breaker is a 125-amp, 2-pole, 120/240V thermal-magnetic breaker with an MP-T design and a 10 kA interrupting rating. Manufacturer specifications identify the MP2125 for use in compatible 125A and 225A single-phase output WMM, WML, and WMT meter stack applications, making equipment compatibility a key part of the selection process. For contractors, maintenance teams, and property professionals working with legacy electrical distribution equipment, matching the catalog number, amperage, voltage, interrupting rating, and breaker design can help avoid the guesswork of replacement work.

Key Features and Benefits

• 125A current rating: Rated for 125 amps in compatible electrical distribution applications.
• 2-pole configuration: Provides the specified two-pole arrangement required by supported equipment.
• 120/240V rating: Designed for compatible single-phase 120/240V AC electrical systems.
• Thermal-magnetic operation: Uses thermal-magnetic trip technology for overload and short-circuit protection within its rated application.
• MP-T design: The breaker type is a key identifier when matching an existing MP2125 installation.
• Specific meter stack application: Manufacturer documentation identifies use with compatible 125A and 225A single-phase output WMM, WML, and WMT meter stacks.

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number / MFN: MP2125
  
• Article Number: US2\:MP2125
  
• Breaker Type: MP-T
  
• Trip Technology: Thermal-Magnetic
  
• Amperage Rating: 125A
  
• Voltage Rating: 120/240V AC
  
• Number of Poles: 2
  
• Interrupting Rating: 10 kA
  
• Operating Temperature: 40°C
  
• Application: Compatible with 125A and 225A single-phase output WMM, WML, and WMT meter stacks
  
• Net Weight: 0.705 lb
  
• UPC: 040892281194
  
• Commodity Code: 8536200020
  
• Export Classification: ECCN EAR99 / AL N
  
• Product Group: 5200
  
• Catalog ID: LV10.1
  
• Group Code: P320
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

Manufacturer documentation identifies the Siemens MP2125 as HACR Rated. This certification information can help confirm that the breaker meets the requirements for a particular piece of electrical equipment or installation.

Where It Works Best

The Siemens MP2125 125A circuit breaker is intended for compatible electrical distribution equipment that requires its MP-T breaker design, 2-pole configuration, 125A rating, 120/240V operating voltage, and 10 kA interrupting rating. More specifically, the manufacturer identifies it for use in compatible 125A and 225A single-phase output WMM, WML, and WMT meter stacks.