ABB / General Electric THHQB32025 Miniature Circuit Breaker

This bolt-on breaker is specifically designed for use in GE A-Series panelboards and GE AQ Lighting Panels. It is not compatible with standard residential load centers that require plug-on breakers.

No. Standard GE residential load centers, such as the PowerMark Gold series, require plug-on Q-Line breakers like the THQL or THHQL. The THHQB32025 is a bolt-on breaker intended for commercial A-Series and AQ panels.

The primary difference is the interrupting capacity. THQB breakers are rated at 10kAIC, while THHQB breakers have a higher interrupting rating of 22kAIC. Both share the same physical dimensions and bolt-on mounting style.

Yes, the THHQB32025 can replace a THQB32025. It has the exact same physical footprint and bolt-on connection but offers a higher interrupting capacity (22kAIC versus 10kAIC), which safely meets or exceeds the requirements of the standard THQB version.

The THHQB32025 features a bolt-on connection. It fastens directly to the panelboard busbar using screws, providing a secure, vibration-resistant connection typically required in commercial and industrial applications.

The LI designation indicates that this thermal-magnetic breaker includes Long-Time (L) and Instantaneous (I) trip functions. The thermal component provides a delayed trip for sustained overloads, while the magnetic component trips instantaneously in the event of a short circuit.

ABB acquired GE Industrial Solutions in 2018. Depending on the manufacturing date, this breaker may be branded as either ABB or General Electric. The form, fit, function, and specifications remain identical regardless of the label.