ABB / General Electric THHQL32050 Molded Case Circuit Breaker

No. The THHQL32050 is a 3-pole breaker that requires a 3-phase electrical system. It is designed for 3-phase GE PowerMark Gold load centers and GE A-Series panelboards. It will not fit or function correctly in a standard single-phase residential panel.

The primary difference is the interrupting rating. The standard THQL32050 has a 10kAIC rating, while the THHQL32050 features a higher 22kAIC rating for systems with higher available fault current. Both share the same physical dimensions and fit the same GE panels.

The tightening torque depends on the wire size used. For 8 AWG wire, torque to 40 in-lb. For 6 AWG to 4 AWG wire, torque to 45 in-lb. For 3 AWG wire, torque to 50 in-lb. Always verify with the manufacturer label on the breaker before installation.

The 22kAIC rating indicates the maximum fault current the breaker can safely interrupt without sustaining damage. This high-interrupting capacity is often required in commercial applications or locations physically close to utility transformers where potential fault currents exceed the standard 10kAIC limit.

The thermal magnetic mechanism provides two types of protection. The thermal element offers long-time protection against sustained overloads, while the magnetic element provides instantaneous protection against severe short circuits.