GE THHQB1120 - 20 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

GE THHQB1120 is a 20A, 120V, 1-pole bolt-on molded case circuit breaker designed for dependable branch circuit protection in panelboards and loadcenters.

Secure, vibration-resistant mounting

With a bolt-on mounting style, this breaker delivers a rigid connection to the bus, reducing loose connections and arcing from vibration in busy electrical panels—ideal for both new installations and panel upgrades in residential, commercial, and light industrial settings.

Precise, reliable protection with a thermal-magnetic trip

The thermal-magnetic trip unit provides stable, repeatable protection against overcurrent and short circuits, ensuring your circuits are safeguarded under a predictable range of conditions. The 20A rating is well-suited for general lighting and outlet circuits, while 120V operation matches standard power distribution in homes and small workplaces.

Why choose GE THHQB1120

• OEM-compatible performance: Designed to work with matching GE OEM loadcenters and panelboards for coordinated protection and easy replacement.
• 1-pole simplicity: Streamlines protection for a single circuit, reducing panel clutter and simplifying troubleshooting.
• Versatile applications: Suitable for residential, commercial, and light industrial environments where reliable overcurrent protection is essential.
• Durable construction: Molded case design resists wear in service panels, with a secure bolt-on interface for long-term reliability.

Technical snapshot

• Manufacturer: GE
• Part number: THHQB1120
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 20A
• Voltage rating: 120V
• Number of poles: 1
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases

Install this breaker in panelboards or loadcenters serving lighting circuits, receptacle circuits, and other branch circuits in homes, small offices, retail spaces, or light industrial facilities. Its bolt-on design makes it straightforward to upgrade or replace older breakers that may compromise panel safety.

Installation and care tips

• Ensure electrical power is fully de-energized before handling breakers.
• Attach the breaker to the panel’s bus with the appropriate mounting screws, following the panel’s installation instructions.
• Verify all connections are tight to the panel’s torque recommendations (as detailed in the panel documentation).
• Periodically inspect panel connections for signs of overheating or looseness and replace as needed.

When you need a dependable, GE-compatible solution for protecting a single circuit in panelboards or loadcenters, the THHQB1120 delivers consistent performance, straightforward installation, and reliable long-term operation in a compact 1-pole, 20A package.