ABB / General Electric TQDL21150 Molded Case Circuit Breaker

This plug-on breaker is approved for use in GE PowerMark Gold, GE PowerMark Plus, and ABB ReliaHome load centers. Because it utilizes the double-wide QD frame, you must have four standard 1-inch spaces available in a 2x2 configuration to install it.

The breaker lugs accept copper or aluminum wiring from 1/0 AWG to 250 kcmil. When installing aluminum conductors, electricians should apply a listed joint compound to prevent oxidation. Always verify the correct torque settings printed directly on the breaker label prior to energizing.

Yes. The TQDL21150 has a 10kAIC fault rating, while the THQDL21150 is the high-interrupting version rated at 22kAIC. They share the same physical dimensions, so the THQDL21150 can serve as a direct, upgraded substitute if your facility requires a higher interrupting capacity.

Yes, the TQDL21150 carries a HACR rating, making it UL approved to protect dedicated circuits for heavy-duty heating, air conditioning, and refrigeration equipment.

Yes. The breaker is built with an internal common trip mechanism. An overload or short circuit detected on one leg will force both poles to open simultaneously, safely disconnecting all power to the 240V load.

Depending on the specific load center configuration and the required retaining hardware, this Q-Line molded case breaker can function either as a main breaker or a large branch feeder for subpanels and heavy commercial loads.