ABB / General Electric TFJ236150WL Molded Case Circuit Breaker

The "WL" suffix indicates that the circuit breaker comes factory-equipped with line and load terminal lugs. For this model, the included lugs accept 4 AWG to 300 kcmil copper or aluminum wire.

This is a unit-mount circuit breaker designed for individual mounting or installation within compatible enclosures. It is not designed for plug-in or bolt-on panelboard chassis mounting.

The TFJ236150WL features a fixed thermal element for overload protection and an adjustable magnetic element for short-circuit protection. The magnetic trip threshold can be adjusted via a dial on the face of the breaker to coordinate with downstream devices or specific load inrush characteristics.

When applying this thermal-magnetic breaker in DC circuits, ensure the system voltage does not exceed its 500VDC maximum rating. DC applications often require wiring multiple poles in series to safely interrupt the arc, so consult the manufacturer guidelines for proper pole wiring configurations based on your specific DC voltage.

Standard thermal-magnetic molded case circuit breakers without "Line" and "Load" markings are generally suitable for reverse feeding. Always verify the specific labeling on the physical breaker and consult local electrical codes before backfeeding.

ABB acquired GE Industrial Solutions in 2018. As a result, legacy GE molded case circuit breakers like the F-Frame TFJ series are now manufactured and supported under the ABB brand portfolio.

Molded case circuit breakers generally require minimal maintenance. It is recommended to periodically exercise the breaker by manually toggling it on and off, inspect the terminals for proper torque, and ensure the operating environment remains free of excessive dust and moisture.

Yes, as part of the F225 line, this breaker shares the same physical dimensions and mounting footprint as older GE F-Frame units. It can be used as a direct drop-in replacement in existing enclosures or individual mounting setups designed for this frame size.

The LI designation stands for Long-Time and Instantaneous protection. The Long-Time function uses a fixed thermal element to protect against sustained overloads, while the Instantaneous function uses an adjustable magnetic element to clear severe short-circuit faults immediately.