ABB / General Electric THHQB22060 Miniature Circuit Breaker

The 60A rating is the breaker's current rating for overcurrent protection. Select it according to the circuit load and conductor sizing requirements, rather than treating 60A as an instantaneous trip threshold.

This is a 2-pole, single-phase breaker rated for 120VAC, 120/240VAC and 240VAC. Use the circuit voltage and the number of poles required for overcurrent protection to guide selection.

The interrupting rating is 22kAIC at 120/240VAC, which describes the fault current the breaker can interrupt at that voltage. For a 240V installation, the available fault current must not exceed this rating.

The thermal element provides long-time response to overloads, while the magnetic element provides instantaneous response to high fault currents. Both are fixed, so trip settings cannot be adjusted during installation.

The load-side lug accepts a wire range of 8-3 AWG. Choose a conductor within that range while also meeting the circuit's ampacity requirements; terminal acceptance alone does not determine conductor sizing.

Bolt-on mounting uses a bolted connection to secure the breaker. Plan for fastening the breaker during installation, with outgoing conductors terminated at the load-side lug.

The thermal trip is calibrated at 40°C. Ambient temperature affects thermal trip response, so consider the installation temperature when evaluating overload protection.

HACR refers to heating, air-conditioning and refrigeration applications. This rating supports selection for those applications, while the breaker current, voltage and interrupting ratings still need to meet the circuit requirements.