ABB / General Electric THQB22060 Miniature Circuit Breaker

This breaker is designed for use in GE A-Series panelboards and AQ lighting panels that accept bolt-on Q-Line breakers.

No. While both are 1-inch wide per pole Q-Line breakers, the THQB is a bolt-on breaker designed for commercial panels, whereas the THQL is a plug-in breaker typically used in residential load centers.

The primary difference is the interrupting rating. The THQB22060 is rated at 10kAIC, while the THHQB22060 has a higher interrupting capacity of 22kAIC. Both share the same physical dimensions and bolt-on mounting style.

For the box lugs on this breaker, the recommended torque depends on the wire size: 40 in-lb for 8 AWG, 45 in-lb for 6 to 4 AWG, and 50 in-lb for 3 AWG conductors.

ABB acquired GE Industrial Solutions, meaning GE Q-Line circuit breakers, including the THQB series, are now manufactured and branded under the ABB umbrella. They are exact replacements for older GE-branded units.

In standard GE A-Series panelboards, THQB breakers bolt directly to the bus connections and typically do not require separate mounting hardware kits for basic installation, though filler plates may be needed for empty spaces.