ABB / General Electric THQL21125 Molded Case Circuit Breaker

This breaker is designed for use in GE PowerMark Gold and PowerMark Plus load centers, as well as compatible AL series lighting panels that accept Q-Line plug-in breakers.

THQL breakers are standard 1-inch per pole breakers, while THQP are 1/2-inch half-size breakers. You can only use the THQL21125 if your panel label explicitly lists THQL as an approved breaker type and has two full 1-inch spaces available.

As a 2-pole THQL series breaker, it requires two standard 1-inch spaces, taking up a total of 2 inches on the panel bus.

Yes, it can be used as a back-fed main breaker in compatible main lug load centers. However, it requires a separate hold-down kit, such as the THQLRK retainer bracket, to comply with National Electrical Code (NEC) requirements.

Yes, this breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment that requires this specific listing.

The LI designation indicates that the thermal-magnetic trip unit provides both Long-Time (thermal) protection against sustained overloads and Instantaneous (magnetic) protection against short circuits.

Yes. Following ABB acquiring GE Industrial Solutions, these breakers are manufactured to the exact same specifications and are fully interchangeable. The product may arrive with either ABB or GE branding.

Yes, the THQL21125 is the direct replacement for older GE 125A 2-pole Q-Line breakers, including older TQL and THQ models with the same amperage and voltage ratings.

No, the THQL21125 is a standard thermal-magnetic circuit breaker. It does not provide Ground Fault Circuit Interrupter (GFCI) or Arc Fault Circuit Interrupter (AFCI) protection.