QSH2125 - 125 Amp Circuit Breaker

QSH2125 - 125 Amp Circuit Breaker

The QSH2125 is a 125 amp, 2-pole thermal magnetic circuit breaker made for protecting 120/240VAC electrical systems from overloads and short circuits. With a 42kA interrupting rating, it's a good fit for applications where higher available fault current calls for added protection. The thermal magnetic trip unit reacts to both sustained overloads and sudden fault conditions, helping protect electrical equipment and reduce the risk of damage. This breaker is commonly used in commercial and industrial electrical distribution systems, as well as HVAC equipment that requires HACR-rated protection. It operates on 60Hz power and is rated for 40°C ambient temperatures, making it suitable for many everyday installation environments. It also accepts #3 through 300 kcmil copper or aluminum wire, giving electricians more flexibility when wiring larger circuits. If you're replacing an existing breaker or servicing compatible electrical equipment, the QSH2125 circuit breaker offers the performance and electrical ratings professionals look for without adding unnecessary complexity.

Key Features and Benefits

• 125 Amp Current Rating: 125 amp current rating.
• 2-Pole Design: 2-pole design for 120/240VAC systems.
• 42kA Interrupting Capacity: 42kA interrupting capacity.
• Thermal Magnetic Trip Protection: Thermal magnetic trip protection for overloads and short circuits.
• HACR Rated: HACR rated for qualifying HVAC applications.
• 40°C Operating Rating: Rated for 40°C operating environments.
• Flexible Conductor Range: Accepts #3–300 kcmil copper or aluminum conductors.
• Compact Size: Compact size for compatible panel installations.
  

Technical Specifications

• Part Number: QSH2125
  
• Type: QSHH
  
• Poles: 2
  
• Current Rating: 125 Amps
  
• Voltage: 120/240VAC
  
• Interrupting Rating: 42kA @ 120/240VAC
  
• Frequency: 60Hz
  
• Trip Type: Thermal Magnetic
  
• HACR Rated: Yes
  
• Ambient Rating: 40°C
  
• Wire Range: #3–300 kcmil CU/AL
  
• Dimensions:
  • Height: 7.88 in.
  • Width: 2.13 in.
  • Depth: 3.00 in.

Material Compliance and Certifications

• Thermal Magnetic Circuit Breaker: Thermal magnetic circuit breaker.
• HACR Type Rated: HACR Type rated.
• 120/240VAC, 60Hz Operation: Rated for 120/240VAC, 60Hz operation.
• Conductor Compatibility: Compatible with copper and aluminum conductors within the specified wire range.
• Industry Standards: Manufactured to applicable industry standards for this product class.
  

Where It Works Best

• The QSH2125 is often used in commercial buildings, industrial facilities, manufacturing plants, electrical distribution panels, mechanical rooms, and HVAC systems that require a 125 amp, 2-pole circuit breaker with a 42kA interrupting rating. It's a practical choice for protecting larger branch circuits where dependable overcurrent protection is important.