Eaton / Cutler-Hammer FD3125L Molded Case Circuit Breaker

In the Eaton Series C nomenclature, the "L" suffix indicates that the circuit breaker is supplied with both line and load terminals (lugs) installed from the factory.

Yes, Eaton Series C thermal-magnetic F-frame circuit breakers, including the FD3125L, are suitable for reverse-feed applications.

The difference is the interrupting capacity at 480VAC. The FDB is rated for 14kAIC, the FD is rated for 35kAIC, and the HFD is rated for 65kAIC at 480VAC. All three share the same physical dimensions and F-frame footprint.

Yes, this thermal-magnetic breaker is rated for up to 250VDC with an interrupting capacity of 10kAIC. When wiring for DC applications, specific pole series wiring configurations may be required depending on the system grounding.

This is a unit-mount circuit breaker. It is designed to be bolted directly to the mounting pan or chassis in enclosures, switchboards, and motor control centers, rather than plugging onto a busbar.

The FD3125L comes with a fixed thermal-magnetic trip unit. If an electronic trip unit is required for adjustable settings, you must replace it with an FDE, HFDE, or FDCE frame breaker equipped with a Digitrip unit.

Yes, the standard line and load lugs included with this breaker are dual-rated for both copper and aluminum conductors ranging from 4 AWG to 4/0 AWG.

Yes, Eaton Series C breakers feature a push-to-trip button on the front cover. This allows electricians to mechanically trip the breaker to verify the operating mechanism is functioning correctly during routine maintenance.

After a trip event, the operating handle will move to the middle position. To reset the breaker, push the handle to the extreme OFF position until it clicks, then push it to the ON position. If it tripped due to a thermal overload, allow time for the bimetal element to cool before resetting.