Q21520CT - Quadplex 15/20 Circuit Breaker

Q21520CT - Quadplex 15/20 Circuit Breaker

The Q21520CT quadplex circuit breaker is designed for electricians and contractors who need to add circuits without giving up valuable panel space. Combining 15-amp and 20-amp protection in a single QT frame unit, this plug-in breaker provides dependable overcurrent protection for 120/240VAC systems. With a 10kA interrupting capacity, it’s built to safely clear fault currents in typical residential and light commercial applications. The common trip feature ensures paired circuits disconnect together, adding an extra layer of safety where multi-wire branch circuits or shared neutrals are involved. Rated for 40°C environments and carrying an HACR classification, the Q21520CT is well suited for HVAC-related equipment as well as general-purpose branch circuits.

Instead of crowding your panel with multiple breakers, this quadplex configuration helps you make better use of available space while maintaining reliable circuit protection. It’s a practical choice for service upgrades, remodels, or new installations where efficiency matters.

Key Features and Benefits

• Quadplex Design (15A/20A): Two double-pole breakers in one compact unit to maximize panel capacity.
• 10kA @ 120/240VAC: Safely interrupts fault currents up to 10,000 amperes.
• Common Trip: Both poles trip together for improved safety and code compliance.
• Plug-In Mounting: Quick, straightforward installation in compatible QT panelboards.
• HACR Rated: Suitable for heating, air conditioning, and refrigeration equipment.
• 40°C Rated: Handles higher ambient temperatures common in electrical rooms.

Technical Specifications

• Part Number: Q21520CT
  
• Poles: Quadplex
  
• Amperage: 15/20 Amp
  
• Voltage: 120/240VAC
  
• Interrupting Rating: 10kA
  
• Frame Type: QT
  
• Trip Type: Common Trip
  
• Mounting: Plug-In
  
• Ambient Rating: 40°C
  
• HACR Rated: Yes
  
• Height: 3.13 in.
  
• Ship Weight: 2.0 lbs
  

Material Compliance and Certifications

• Industry Standards: Manufactured to meet established industry standards for molded case circuit breakers, the Q21520CT supports installations that require a 10kA interrupting rating at 120/240VAC.
• HACR Rating: The HACR rating confirms its suitability for HVAC applications when installed according to applicable electrical codes. As with any breaker, compatibility with the specific load center should be verified prior to installation.
  

Where It Works Best

• The Q21520CT is commonly used in residential panels, apartment units, light commercial spaces, and small office environments where additional circuits are needed but panel space is limited. It’s especially useful for HVAC systems, air conditioning units, refrigeration equipment, and multi-wire branch circuits that require paired protection with common trip functionality.