GE THHQB2120 - 20 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the GE THHQB2120, a 20A, 240V, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Built for environments where vibration happens—from busy commercial spaces to busy residential panels—it combines a rigid bolt-on mounting with a precision thermal-magnetic trip unit for consistently reliable protection.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays exactly where it should, reducing the risk of connection loosening over time.
• Thermal-magnetic trip unit offers stable, repeatable protection by combining overload sensing (thermal) with instantaneous short-circuit disconnect (magnetic) for fast, reliable response.
• Designed for seamless compatibility with matching OEM load centers and panelboards, ensuring proper fit, performance, and coordinated protection across your electrical system.
• Versatile for multiple settings—well-suited for residential, commercial, and light industrial applications where dependable two-pole protection is essential.

Ideal use cases

Use the GE THHQB2120 to protect main or branch circuits in panelboards and load centers where a compact, robust, 2-pole solution is required. Ideal for retrofit or new installations in homes, office suites, small shops, and light manufacturing environments that rely on consistent trip performance and secure mounting.

Key specifications at a glance

• Manufacturer: GE
• Part Number: THHQB2120
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 240V
• Poles: 2
• Mounting Style: Bolt-on
• Applications: Branch circuit overcurrent and short-circuit protection

Practical tips for installation and longevity

Installers and facilities managers will appreciate the bolt-on design for straightforward field mounting and a robust bus connection. Ensure the breaker aligns with the panel’s bus stabs and follow the manufacturer’s torque guidelines for the mounting hardware. Since the unit is thermal-magnetic, it responds to both overloads and short circuits in a predictable manner, helping reduce nuisance trips while still providing rapid disconnect when faults occur. Regularly inspect mounting hardware and panel cleanliness to maintain optimal performance in residential, commercial, and light industrial environments.