QS2125 - 125Amp Circuit Breaker

QS2125 - 125Amp Circuit Breaker

Finding the right circuit breaker starts with knowing exactly what your electrical equipment requires. The Siemens QS2125 is a 125-amp, 2-pole thermal-magnetic circuit breaker designed for compatible electrical distribution systems operating at 120/240V AC.

Key Features and Benefits

• 125-Amp Current Rating: Provides overcurrent protection for electrical circuits and distribution equipment designed to use a 125A breaker.
• 2-Pole Configuration: Supports approved two-pole applications in 120/240V AC electrical systems.
• Thermal-Magnetic Protection: Combines thermal overload protection with magnetic short-circuit protection.
• Siemens Type QS Design: Helps identify the correct breaker for equipment specifically approved to accept the QS2125.
• HACR Designation: Suitable for applicable heating, air-conditioning, and refrigeration equipment when permitted by the equipment manufacturer.
• Copper and Aluminum Wire Compatibility: Supports #3 AWG to 300 kcmil CU/AL conductors within the manufacturer's approved termination requirements.

Technical Specifications

• Manufacturer: Siemens
  
• Part Number: QS2125
  
• Product Type: Circuit Breaker
  
• Breaker Type: QS
  
• Amperage Rating: 125 Amps
  
• Number of Poles: 2
  
• Voltage Rating: 120/240V AC
  
• Interrupting Rating (AIC): 10kA (10,000 Amps) at 120/240V AC
  
• Trip Mechanism: Thermal-Magnetic
  
• Frequency: 60Hz
  
• HACR Designation: HACR Type
  
• Temperature Calibration: 40°C
  
• Compatible Conductor Materials: Copper and Aluminum (CU/AL)
  
• Wire Range: #3 AWG–300 kcmil
  
• Height: 7.88 inches
  
• Width: 2.13 inches
  
• Depth: 3.00 inches
  

Material Compliance and Certifications

The Siemens QS2125 circuit breaker is identified as a 60Hz, 40°C, HACR-type thermal-magnetic breaker. Its specified conductor range supports copper and aluminum wiring from #3 AWG through 300 kcmil, subject to the manufacturer's approved terminal, conductor, and installation requirements.

Where It Works Best

• Existing Siemens QS2125 Circuit Breaker Replacements
  
• Compatible Siemens Type QS Electrical Equipment
  
• 125-Amp Main Breaker Applications
  
• Approved 120/240V AC Distribution Systems
  
• Electrical Installations Requiring 10kA Interrupting Capacity
  
• Compatible HACR Equipment Applications
  
• Commercial Electrical System Maintenance
  
• Electrical Panel Repairs and Equipment Servicing