ABB / General Electric TK236225 Molded Case Circuit Breaker

Yes, this legacy K-frame breaker is compatible with existing GE A-Series panelboards, switchboards, and motor control centers designed for bolt-on K-frame units.

The adjustable magnetic trip allows you to set the instantaneous short-circuit pickup level. This is critical for coordinating with downstream devices and preventing nuisance tripping during high inrush events, such as motor startups, without altering the fixed thermal overload protection.

Yes, the factory-installed lugs are dual-rated for both copper and aluminum (Cu/Al) conductors ranging from 4 AWG to 300 kcmil. Ensure you apply the correct torque specifications and use an appropriate oxide inhibitor when terminating aluminum wire.

Both are 225A, 3-pole K-frame breakers, but the THFK version features a higher interrupting capacity (AIC rating). The THFK236225 is often used as a direct substitute when a higher fault current rating is required by the system study.

Yes, this breaker features an interchangeable trip unit design. This allows electricians to change the continuous current rating of the K-frame in the field without replacing the entire breaker assembly, provided the new trip unit matches the frame requirements.

Because this is a bolt-on unit, the entire bus must be de-energized before installation. Electricians must follow standard lockout/tagout procedures and verify zero voltage to avoid arc flash hazards while bolting the breaker to the busbars.