ABB / General Electric THHQB1130 Miniature Circuit Breaker

No. The THHQB1130 is a bolt-on breaker designed specifically for commercial GE A-Series and ReliaGear lighting panelboards. Standard residential load centers require plug-on breakers, such as the THQL series.

Yes. The THHQB1130 shares the same physical dimensions and bolt-on mounting as the standard THQB1130, but offers a higher interrupting rating of 22kAIC versus 10kAIC. It is a suitable upgrade for systems requiring higher fault current protection.

The LI designation means the breaker uses a thermal-magnetic trip unit with Long-Time and Instantaneous protection. The thermal element provides a delay for standard overloads, while the magnetic element offers instantaneous tripping during severe short circuits.

As a bolt-on breaker, it features a mounting bracket with a captive screw that fastens directly into the threaded holes on the panelboard busbar. This creates a highly secure, vibration-resistant connection preferred in commercial applications.

Yes, the box lugs are dual-rated for both copper and aluminum conductors. Ensure you use the correct wire gauge, which is 14 to 8 AWG for copper and 12 to 8 AWG for aluminum, and apply an approved oxide inhibitor when terminating aluminum wire.

Panel builders specify the THHQB series when the calculated available fault current at the panel exceeds 10,000 amps. The 22kAIC rating of the THHQB1130 ensures it can safely interrupt higher fault currents without catastrophic failure, maintaining compliance with safety requirements for commercial installations.

No. This miniature circuit breaker features fixed thermal and fixed magnetic trip settings. It is calibrated at the factory for a 30A continuous load and cannot be adjusted in the field.

No. The THHQB1130 is rated for a maximum of 120/240VAC. For 277VAC lighting circuits in commercial facilities, a different breaker series designed for higher voltages, such as the GE TEY series, is required.