THQLQ204020 - Quad 20A-40A-20A Circuit Breaker

THQLQ204020 - Quad 20A-40A-20A Circuit Breaker

The THQLQ204020 quadplex circuit breaker is designed to maximize panel space while delivering dependable overcurrent protection in residential and light commercial electrical systems. Built on the trusted THQLQ frame and part of the Q-Line series, this plug-on molded case circuit breaker features a unique quad configuration—two 1-pole 20A breakers on the outside and one 2-pole 40A breaker in the center. That combination allows you to power multiple circuits from a single compact footprint, making it a smart solution for load expansion or panel upgrades where space is limited. HACR rated and engineered for consistent thermal-magnetic trip performance, the THQLQ204020 helps safeguard wiring and connected equipment from overloads and short circuits while maintaining reliable, code-compliant operation.

Whether you’re an electrical contractor handling a service upgrade or a facility maintenance professional managing panel capacity, this quadplex breaker provides a space-saving and efficient way to add 120/240V circuit protection without compromising performance.

Key Features and Benefits

• Quadplex Configuration (20/40/20 Amp): Combines two 20A single-pole breakers and one 40A double-pole breaker in a single unit for efficient load management.
• Space-Saving Design: Ideal for panels where circuit expansion is needed but available breaker spaces are limited.
• THQLQ Frame Type: Designed for compatibility with select Q-Line load centers and panelboards.
• Plug-On Mounting: Quick, secure installation that reduces labor time and ensures solid bus connection.
• HACR Rated: Suitable for heating, air conditioning, and refrigeration applications.
• Thermal-Magnetic Protection: Provides reliable trip response to both sustained overloads and short-circuit conditions.
• Molded Case Construction: Built for durability and long service life in demanding electrical environments.

Technical Specifications

• Part Number: THQLQ204020
  
• Poles: Quad (2 x 1-Pole 20A outer breakers, 1 x 2-Pole 40A center breaker)
  
• Amperage Rating: 20/40/20 Amps
  
• Frame Type: THQLQ
  
• Series: Q-Line
  
• Mounting Type: Plug-On
  
• Breaker Type: Quadplex Molded Case Circuit Breaker
  
• HACR Rated: Yes
  
• Approximate Shipping Weight: 2.0 lbs
  
• Height: 3.31 inches
  

Material Compliance and Certifications

• Industry Standards: The THQLQ204020 circuit breaker is manufactured to meet applicable industry standards for molded case circuit breakers, helping ensure dependable performance and safety in listed electrical distribution equipment.
• HACR Certification: HACR certification confirms suitability for HVAC-related applications.
• Code Compliance: As with all properly rated and installed breakers, it is intended for use in accordance with the National Electrical Code (NEC) and local electrical regulations.
  

Where It Works Best

• Residential load centers requiring additional 120/240V circuits without increasing panel size
• HVAC installations where a 2-pole 40A circuit is needed alongside branch circuits
• Light commercial panelboards with limited breaker space
• Remodels and service upgrades that call for compact, multi-circuit protection
• Maintenance replacements in compatible Q-Line panels