ABB / General Electric THQL32060ST1 Molded Case Circuit Breaker

The ST1 suffix designates a factory-installed 120VAC shunt trip. This allows the breaker to be opened remotely by an external control signal, which is commonly used for emergency stop circuits, fire alarm interfaces, or equipment shutdown schemes.

The shunt trip mechanism requires a dedicated 120VAC control circuit. When voltage is applied to the shunt trip coil via a remote switch or relay, it mechanically trips the breaker to open the primary contacts.

This breaker is compatible with GE PowerMark Gold load centers and GE A-Series panelboards. It requires three inches of total panel space, as THQL plug-in breakers occupy one inch per pole.

No. While they share similar electrical ratings, THQL breakers use a plug-in connection, whereas THQB breakers are bolt-on. You must verify your panel's busbar design to ensure you select the correct mounting style.

No. This is a standard thermal-magnetic breaker equipped with a shunt trip. It does not provide GFCI or AFCI protection. GE breakers with those features will typically have GFT, GFEP, or AF2 suffixes in their catalog numbers.

It features a fixed thermal-magnetic trip unit with long-time and instantaneous (LI) functions. The thermal element responds to sustained overloads, while the magnetic element provides immediate tripping during short circuits.

Yes, the box lug terminals are dual-rated for both copper and aluminum conductors ranging from 8 AWG to 3 AWG. You should apply a suitable oxide inhibitor when terminating aluminum wire.