GE ABB THQB2120ST1 Circuit Breaker | 20 Amp, 2 Pole, 120/240V

The GE ABB THQB2120ST1 is a thermal-magnetic molded case circuit breaker designed for secure, bolt-on installation in compatible residential and commercial load centers and lighting panels. It provides standard overload (long-time) and short-circuit (instantaneous) protection for single-phase electrical systems. The "ST1" in the model number signifies the integral 120 VAC shunt trip feature, which allows the breaker to be tripped remotely, often for emergency shut-off or integration with control systems.

• Integrated Shunt Trip: Features a factory-installed 120V AC shunt trip mechanism, enabling remote activation of the trip function.
  
• Amperage & Poles: A 20-ampere rated breaker with a 2-pole configuration.
  
• Mounting Type: Bolt-On design ensures a secure and reliable physical and electrical connection to the panelboard bus bars.
  
• Protection Type: Utilizes thermal-magnetic technology to protect against both persistent overloads and sudden short circuits.
  
• Interrupting Rating: Offers a standard interrupting capacity of 10 kA (10,000 Amps) at 120/240 VAC.
  
• Voltage Compatibility: Rated for use in 120/240 VAC systems.
  
• Compact Design: Part of the Q-Line family, it features a space-saving design, with each pole being one inch wide.
  
• Safety & Reliability: Includes a quick-make/quick-break mechanism, common trip bars, and easy-to-spot trip indication.
  
• Certifications: UL Listed and CSA Certified for safety standards.
  
• Special Markings: HACR rated, suitable for heating, air conditioning, and refrigeration applications.

Specifications