QS2125HH - 125Amp Circuit Breaker

QS2125HH - 125Amp Circuit Breaker

When your electrical system demands dependable protection under high fault current conditions, the QS2125HH delivers the performance professionals expect. This 125 Amp, 2-pole HQS thermal magnetic circuit breaker is built to help protect electrical equipment from overloads and short circuits while supporting the reliable operation of commercial and industrial power distribution systems.

With a 65kA interrupting capacity at 120/240VAC, the QS2125HH is designed for applications where higher available fault currents require a breaker that can respond quickly and confidently. Its thermal magnetic trip mechanism combines long-term overload protection with fast response to short-circuit events, helping reduce the risk of equipment damage and costly downtime. Whether you're maintaining an existing electrical system or replacing a compatible breaker, this model offers the performance and durability needed to keep power flowing safely.

Designed for 60Hz systems and carrying a HACR Type rating, the QS2125HH is well suited for demanding HVAC, refrigeration, and other commercial electrical applications. It also accepts a wide #3–300 kcmil copper or aluminum wire range, making installation more flexible across a variety of projects.

Key Features and Benefits

• 125 Amp Rating: 125 Amp rating for higher-capacity electrical distribution systems.
• Two-Pole Design: Two-pole design for 120/240VAC applications.
• 65kA Interrupting Capacity: High 65kA interrupting capacity for installations with elevated available fault current.
• Thermal Magnetic Trip Technology: Thermal magnetic trip technology provides dependable overload and instantaneous short-circuit protection.
• HACR Type Rated: HACR Type rated for heating, air conditioning, and refrigeration equipment.
• 60Hz Operation: Suitable for 60Hz electrical systems.
• 40°C Ambient Rating: Rated for operation in ambient temperatures up to 40°C.
• Wide Conductor Compatibility: Accepts #3–300 kcmil copper or aluminum conductors.
• Long Service Life: Built for long service life in commercial and industrial environments.
  

Technical Specifications

• Part Number: QS2125HH
  
• Type: HQS
  
• Poles: 2
  
• Amperes: 125A
  
• Voltage Rating: 120/240VAC
  
• Interrupting Capacity: 65kA @ 120/240VAC
  
• Frequency: 60Hz
  
• Trip Unit: Thermal Magnetic
  
• HACR Rated: Yes
  
• Ambient Temperature: 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 Design: Thermal magnetic circuit breaker design for dependable overcurrent protection.
• HACR Type Rated: HACR Type rated for compatible HVAC and refrigeration equipment.
• Conductor Compatibility: Compatible with both copper and aluminum conductors within the specified wire range.
• 120/240VAC, 60Hz Systems: Designed for use in compatible 120/240VAC, 60Hz electrical distribution systems.
  

Where It Works Best

• The QS2125HH is an excellent choice for commercial buildings, industrial facilities, manufacturing plants, and other electrical distribution systems where dependable circuit protection is essential. It's commonly used with panelboards, switchboards, HVAC equipment, motor loads, and other applications requiring a 125 Amp, 2-pole breaker with a 65kA interrupting rating.