ABB / General Electric THQB32090 Miniature Circuit Breaker

This bolt-on miniature breaker is designed for use in ABB and General Electric A-Series panelboards. It specifically installs in AQ-type lighting and distribution panels.

Yes. Following ABB's acquisition of GE Industrial Solutions, this breaker is manufactured to the exact same specifications. It is a direct drop-in replacement for older General Electric branded THQB32090 breakers.

No. The THQB series features a bolt-on mounting configuration meant for commercial and industrial panelboards. It will not physically snap into standard residential load centers, which typically require plug-on Q-Line breakers like the THQL series.

For the supported 6 AWG to 1/0 AWG conductors, the manufacturer specifies torquing the load side box lugs to 45 in-lb for #6 and #4 AWG wire, and 50 in-lb for #3 AWG to 1/0 AWG wire.

Yes, all THQB miniature circuit breakers carry a Heating, Air Conditioning, and Refrigeration (HACR) rating, making this unit completely compliant for use with dedicated HVAC and motor loads.

Yes. With a maximum voltage rating of 240VAC, this 3-pole breaker is fully compatible with standard 208Y/120V three-phase, four-wire distribution systems commonly found in commercial facilities.

Yes. It includes an internal common trip bar mechanism. If an overload or short circuit occurs on any single phase, the internal linkage ensures that all three poles will trip simultaneously to safely drop power to the entire circuit.

Yes. You can install a compatible handle locking device, such as the THP100 padlocking accessory, to safely lock the breaker toggle in the OFF position during maintenance or service work.