ABB / General Electric THQC21100 Molded Case Circuit Breaker

THQC breakers feature a lug-to-lug (cable-in, cable-out) design intended for 35mm DIN rail or base mounting in enclosures and OEM panels. In contrast, THQB breakers are bolt-on models that physically attach directly onto the busbars of compatible GE panelboards.

Following ABB's acquisition of GE Industrial Solutions, this breaker may ship with either an ABB or GE label. Both branded versions are identical in design, performance, and UL listings, making them completely interchangeable.

It clips directly onto a standard 35mm DIN rail. It can also be base-mounted in custom enclosures using an optional GE DIN rail clip kit. Because it uses a lug-to-lug connection, it does not mount to a panelboard busbar.

Yes, this miniature molded case breaker is HACR rated. It is certified to safely handle the specific inrush currents and operational demands of heating, air conditioning, and refrigeration equipment.

The THQC series features a dedicated visual trip indication mechanism. When a fault is detected, the breaker handle will move to a center position, clearly distinguishing a tripped state from the standard ON or OFF positions.

This two-pole Q-Line breaker requires 2 inches of horizontal DIN rail space. Each individual pole is exactly 1 inch wide.

No. Powermark Gold residential load centers use plug-on THQL or THQP breakers. The THQC21100 is a lug-to-lug, DIN-mountable industrial breaker and lacks the plug-on clips required for residential load center busbars.

Yes. The breaker is equipped with an internal common trip bar. If an overcurrent or short circuit is detected on either leg, both poles will open simultaneously to completely disconnect power to the circuit.

The WL designation stands for With Lugs. Since the THQC product line is built as a lug-to-lug miniature breaker, the factory-installed line and load lugs are inherently included, making THQC21100 and THQC21100WL the exact same functional component.