ABB / General Electric THHQL2120 Miniature Circuit Breaker

Yes. The THHQL2120 shares the same physical dimensions as a standard THQL breaker, measuring 1 inch per pole. It fits perfectly into the same slots in GE A-Series panelboards, PowerMark Gold load centers, and ABB ReliaHome load centers.

The H indicates a high interrupting capacity. While standard THQL breakers offer a 10kAIC rating, the THHQL series provides a 22kAIC rating for installations with higher available fault currents.

Yes. Because the THHQL2120 has a higher interrupting rating of 22kAIC versus the standard 10kAIC and the exact same physical footprint, it is a safe and acceptable replacement for a THQL2120 in compatible GE and ABB panels.

As a standard Q-Line breaker, it requires two full 1-inch spaces, taking up a total of 2 inches of width on the panel bus bar. It will not fit in half-inch THQP tandem slots.

Yes. This breaker is HACR rated, meaning it is approved by UL for use with heating, air conditioning, and refrigeration equipment that requires this specific type of branch circuit protection.

Yes. The THHQL2120 carries an SWD (Switching Duty) rating, which allows it to be safely used as a regular switch for 120V fluorescent lighting loads.

Yes. As a 2-pole breaker, it incorporates an internal common trip bar. If one pole experiences an overload or short circuit, both poles will trip simultaneously to disconnect all ungrounded conductors.

The breaker handle is designed to fall into a center position when a trip occurs. This provides a clear visual indication that the circuit has been interrupted and needs to be reset.