Eaton / Cutler-Hammer FS220030A Molded Case Circuit Breaker

This F-Frame breaker is designed for installation in Eaton and Cutler-Hammer Series C panelboards, switchboards, and motor control centers. It requires a bolt-on connection to the busbar.

Yes, the FS220030A shares the exact same physical dimensions and mounting footprint as the FD2030. However, you must verify your system's fault current requirements, as the FS220030A has a lower interrupting rating of 22kAIC at 240VAC compared to the FD series.

The LI designation means the breaker uses a thermal-magnetic trip unit with Long-Time and Instantaneous functions. The thermal element prevents damage from sustained overloads, while the magnetic element provides immediate tripping during short circuit faults. Both thresholds are factory fixed.

Yes, Series C F-Frame breakers support internal accessories like shunt trips, auxiliary switches, and undervoltage releases. To maintain the UL listing and breaker seal, these accessories must be factory installed and are typically mounted in the left pole.

Electricians can use the push-to-trip button located on the front of the breaker. Pressing this button mechanically trips the mechanism, allowing you to verify that the linkages are moving freely and the breaker can be properly reset before energizing the circuit.

Yes, while primarily used in 240VAC systems, the thermal-magnetic F-Frame trip unit is also rated for 250VDC applications. It provides up to 10kAIC of interrupting capacity for DC power distribution.

A feed-thru connection means the breaker is designed to have power fed into one end and routed out the other, typically using lugs on both the line and load sides. This is standard for standalone enclosures or specific switchboard configurations that do not use a plug-on bus.

If the breaker trips due to a short circuit or severe overload, it should be carefully inspected before resetting. Check the terminals and conductors for signs of overheating, such as discoloration or melted insulation, and verify the mechanical linkages operate smoothly using the push-to-trip button.