THHQB2120 - 20Amp Circuit Breaker

THHQB2120 - 20Amp Circuit Breaker

The THHQB2120 circuit breaker is a dependable 2-pole, 20-amp molded case circuit breaker designed to provide reliable overcurrent and short-circuit protection in your commercial, industrial, and institutional electrical distribution systems. As part of the trusted THHQB Q-Line series, this breaker features a bolt-on mounting design that delivers a secure connection to panelboards, helping you to maintain electrical system integrity in demanding environments. With a 22,000 AIC rating at 120/240VAC, the THHQB2120 is built to interrupt high fault currents while protecting conductors, equipment, and connected loads from damage caused by overloads and short circuits.

Engineered for consistent performance, this HACR-rated circuit breaker is suitable for a variety of applications, including HVAC equipment, lighting systems, branch circuits, and general-purpose power distribution. Its compact footprint allows for efficient installation while maintaining the durability and protection expected from a high-quality molded case circuit breaker. Whether you use it in new installations, system upgrades, or maintenance projects, the THHQB2120 delivers dependable circuit protection for critical electrical infrastructure.

Key Features and Benefits

• 20 Amp current rating for reliable branch circuit protection
• 2-pole configuration designed for 120/240VAC applications
• High 22kAIC interrupting capacity helps protect against significant fault currents.
• Bolt-on mounting design provides a secure and stable connection.
• Part of the trusted THHQB Q-Line circuit breaker family
• HACR rated for use with heating, air conditioning, and refrigeration equipment
• Molded case construction helps withstand demanding electrical environments.
• Compact design simplifies installation and panel integration.
• Suitable for commercial, industrial, and institutional electrical systems

Technical Specifications

• Part Number: THHQB2120
  
• Type: THHQB
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Series: Q-Line
  
• Mounting Style: Bolt-On
  
• Poles: 2
  
• Amperage: 20 Amps
  
• Voltage Rating: 120/240VAC
  
• Interrupting Capacity: 22kAIC
  
• HACR Rated: Yes
  
• Height: 3.5 in.
  
• Width: 2.0 in.
  
• Depth: 2.81 in.
  

Material Compliance and Certifications

The THHQB2120 circuit breaker is manufactured to meet applicable industry standards for molded case circuit breakers and electrical distribution equipment. Its HACR rating indicates suitability for use in heating, air conditioning, and refrigeration applications where compliant overcurrent protection is required. Always verify compatibility and code requirements for your specific installation before use.

Where It Works Best

• The THHQB2120 is well-suited for use in commercial buildings, industrial facilities, educational campuses, healthcare environments, and other electrical distribution systems requiring dependable 20-amp circuit protection. It performs effectively in branch circuit applications serving HVAC equipment, lighting circuits, power distribution panels, control systems, and general electrical loads where a bolt-on, high-interrupting-capacity breaker is required.