THQB1120AF - 20Amp Circuit Breaker

THQB1120AF - 20 Amp Circuit Breaker

The THQB1120AF is a 20-amp, 1-pole Q-Line bolt-on circuit breaker designed to provide dependable overcurrent protection while enhancing your electrical safety through Arc Fault Circuit Interruption (AFCI) technology. Engineered for use in 120VAC electrical distribution systems, this molded case circuit breaker helps you detect potentially dangerous arc faults that can lead to electrical fires, making it an excellent choice for residential and light commercial applications. Its bolt-on mounting design delivers a secure connection to the panelboard, while the compact footprint allows for efficient installation in space-conscious electrical systems. As a HACR-rated breaker, the THQB1120AF is also suitable for heating, air conditioning, and refrigeration equipment applications where code-compliant protection is required.

Key Features and Benefits

• 20 Amp, 1-Pole Configuration for branch circuit protection in 120VAC systems.
• Arc Fault Circuit Interruption (AFCI) technology helps identify hazardous arc fault conditions and enhances electrical safety.
• Bolt-On Design provides a secure, stable connection within compatible panelboards.
• Q-Line Series Construction offers reliable performance for residential and commercial electrical installations.
• 10kA Interrupting Capacity supports protection against fault currents up to 10,000 amperes.
• HACR Rated for use with heating, air conditioning, and refrigeration equipment applications.
• Molded Case Construction helps protect internal components and contributes to long-term durability.
• Compact size simplifies installation and replacement in compatible electrical panels.

Technical Specifications

• Part Number: THQB1120AF
  
• Type: THQB
  
• Product Family: Q-Line
  
• Poles: 1
  
• Amperage Rating: 20 Amps
  
• Voltage Rating: 120VAC
  
• Interrupting Rating (AIC): 10kA @ 120VAC
  
• Mounting Style: Bolt-On
  
• Circuit Protection: Arc Fault Circuit Interruption (AFCI)
  
• HACR Rated: Yes
  
• Construction: Molded Case Circuit Breaker
  
• Height: 3.5 in.
  
• Width: 1.0 in.
  
• Depth: 2.81 in.
  

Material Compliance and Certifications

• The THQB1120AF is manufactured to meet applicable industry standards for molded case circuit breakers and is designed for safe operation within compatible electrical distribution systems. Its HACR rating supports use in HVAC-related applications, while its AFCI functionality aligns with modern electrical safety requirements intended to reduce the risk of arc-fault-related fire hazards. Always verify local code requirements and equipment compatibility before installation.

Where It Works Best

• The THQB1120AF is well-suited for residential service panels, apartment buildings, condominiums, office spaces, retail facilities, and light commercial electrical systems where arc fault protection is required or recommended. It is particularly effective in branch circuits serving living areas, bedrooms, and other occupied spaces where enhanced electrical safety is a priority. Its bolt-on configuration also makes it a practical solution for facilities utilizing compatible Q-Line panelboards and HVAC equipment requiring HACR-rated protection.