ABB / General Electric THQL1120PDF Dual Function Miniature Circuit Breaker

The THQL1120PDF is a Plug-On Neutral (PON) breaker that snaps directly onto the neutral bar of a compatible panel, eliminating the need to wire a separate neutral pigtail. The THQL1120DF includes a traditional pigtail wire that must be manually connected to the panel neutral bus.

This breaker is designed for ABB and GE Q-Line load centers equipped with a plug-on neutral bus, including compatible PowerMark Gold and ReliaHome panels. It will not work in older panels that require pigtail neutral connections.

It provides both Combination Arc Fault Circuit Interruption (AFCI) to detect dangerous arcing conditions and Class A Ground Fault Circuit Interruption (GFCI) to protect personnel from electrical shock.

No. If your GE panel lacks a plug-on neutral feature, you cannot use this specific breaker. You must use the pigtail version, catalog number THQL1120DF, which wires directly into a standard neutral bus.

ABB acquired GE Industrial Solutions. As a result, newly manufactured GE Q-Line breakers often carry the ABB brand name. They are exactly the same product, built to the exact same specifications, and are fully interchangeable.

The box lug terminals accept copper wire sizes from 14 AWG to 8 AWG, and aluminum wire sizes from 12 AWG to 8 AWG. Always follow local electrical codes for proper wire sizing on a 20-amp circuit.

No. The THQL1120PDF is a single-pole breaker designed strictly for 120V single-phase circuits. For a 240V load requiring dual function protection, a 2-pole breaker is required.

The 10kAIC (10,000 Amps Interrupting Capacity) rating signifies that the breaker can safely interrupt a fault current of up to 10,000 amps before sustaining damage. This is a standard interrupting rating for most residential load centers.

No. Single-pole dual function breakers cannot properly monitor current on a multi-wire branch circuit with a shared neutral and will trip continuously. You must use a dedicated 2-pole AFCI/GFCI breaker for those specific applications.

The thermal mechanism responds to sustained overloads by heating up and tripping the breaker to prevent wire damage. The magnetic mechanism responds instantaneously to severe short circuits, immediately cutting power. This operates independently of the electronic AFCI and GFCI sensors.