THQB1120 - 20Amp Circuit Breaker

THQB1120 - 20 Amp Circuit Breaker

The THQB1120 circuit breaker is a dependable 20-amp, 1-pole bolt-on molded-case circuit breaker designed for use in your electrical distribution systems that require reliable branch-circuit protection. As part of the widely used Q-Line series, this Type THQB breaker helps safeguard electrical equipment and wiring from overloads and short circuits while maintaining consistent performance in commercial, industrial, and residential applications. Its bolt-on mounting design provides a secure connection within compatible panelboards, helping you to reduce movement and improve long-term electrical reliability. With a 10 kA interrupting capacity at 120 VAC, the THQB1120 is engineered to deliver effective circuit protection in a compact footprint, making it a practical choice for both new installations and maintenance projects.

Key Features and Benefits

• 20 Amp Rating: for reliable branch circuit protection
• Single-Pole Design: is ideal for 120VAC applications
• Type THQB Configuration: for compatibility with the designated Q-Line panelboards
• Bolt-On Mounting: provides a secure and stable installation
• 10kA Interrupting Capacity (A.I.C.): at 120VAC for dependable fault-current protection
• HACR Rated: for use in heating, air conditioning, and refrigeration applications
• Molded Case Construction: is designed for durability and long service life
• Compact dimensions: simplify installation in space-conscious electrical assemblies
• Protects equipment: helps protect connected equipment from overloads and short-circuit conditions

Technical Specifications

• Part Number: THQB1120
• Type: THQB
• Product Category: Molded Case Circuit Breaker
• Pole Configuration: 1 Pole
• Amperage Rating: 20 Amps
• Voltage Rating: 120VAC
• Interrupting Capacity (A.I.C.): 10kA @ 120VAC
• Mounting Style: Bolt-On
• Series: Q-Line
• HACR Rated: Yes
• Height: 3.5 in.
• Width: 1.0 in.
• Depth: 2.81 in.

Material Compliance and Certifications

• Industry Standards: The THQB1120 circuit breaker is manufactured and tested to meet applicable industry standards for low-voltage circuit protection. Its HACR rating confirms suitability for heating, air conditioning, and refrigeration equipment applications where approved by local codes and installation requirements. Always verify compliance with current electrical codes, equipment specifications, and project requirements before installation.

Where It Works Best

• The THQB1120 is well-suited for commercial buildings, industrial facilities, retail spaces, office environments, multi-family housing, and residential electrical systems that require dependable 120VAC branch-circuit protection. It is commonly used in lighting circuits, receptacle circuits, HVAC equipment, control panels, and general power distribution applications utilizing compatible Q-Line panelboards. The secure bolt-on design makes it especially beneficial in installations where a firm breaker-to-bus connection is preferred for long-term performance and reliability.