ABB / General Electric THFK236225WL Molded Case Circuit Breaker

The WL suffix signifies that the breaker includes factory-installed line and load lugs. Models without this suffix are typically supplied unassembled without terminal lugs. For this 225-amp F225 frame, it utilizes TCAL24 lugs.

Yes, the legacy F225 frame has been replaced by the ABB Tmax XT3 and XT4 molded case circuit breakers, as well as the GE Spectra RMS line. Upgrading to a newer frame may require an adapter kit or different mounting hardware depending on your panelboard.

It is designed to integrate into legacy GE A-Series panelboards, motor control centers, switchboards, and standalone NEMA enclosures that accept F225 frame dimensions.

Yes, the THFK and TFK breakers feature interchangeable thermal-magnetic trip units. This allows electricians to swap the trip mechanism to adjust the maximum continuous current protection without replacing the entire breaker frame.

It features a fixed thermal element for standard overload protection combined with an adjustable magnetic trip. The magnetic setting allows you to adjust the instantaneous short-circuit pickup threshold, which is critical for avoiding nuisance tripping on inductive loads like large motors.

The standard TCAL24 lugs are dual-rated for copper (Cu) and aluminum (Al) wire, accommodating conductor sizes from 4 AWG up to 300 kcmil. Ensure proper torque specifications are met during installation based on the conductor material.

The LI designation means the breaker provides Long-Time (L) overcurrent protection and Instantaneous (I) short-circuit protection. It does not include Short-Time (S) or Ground Fault (G) functions found on solid-state LSIG breakers.

Yes, it is rated for up to 250VDC applications with a 10 kAIC interrupting capacity. It provides reliable protection for industrial DC power distribution systems.