Eaton / Cutler-Hammer FD3020LA04 Molded Case Circuit Breaker

The LA04 suffix means this breaker includes a factory-installed internal auxiliary switch. It provides 1A-1B (one normally open and one normally closed) contacts for remote status monitoring.

Yes, the FD3020LA04 shares the same physical dimensions, F-frame footprint, and electrical ratings as the standard FD3020. The only difference is the internal auxiliary switch, which can be left unwired if your application does not require remote monitoring.

This F-frame breaker is designed for Eaton Series C panelboards, motor control centers, and switchboards. It is a unit mount breaker that bolts directly to the mounting pan or chassis rather than plugging into a bus bar.

No. This breaker features a thermal-magnetic trip unit with fixed Long-Time (L) and fixed Instantaneous (I) protection. Neither the overload nor the short-circuit trip points can be adjusted in the field.

Yes, this breaker is rated for use in DC applications up to 250VDC, providing a 10kA interrupting rating. When installing in DC systems, consult Eaton documentation to determine if wiring multiple poles in series is required for your specific load.

The internal auxiliary switch is accessed via leads or a terminal block on the side of the breaker. You can wire the 1A-1B contacts to an alarm circuit, indicator light, or PLC to monitor whether the breaker is open, closed, or tripped.

The standard factory lugs accept 14 AWG to 1/0 AWG copper or aluminum conductors. Always torque the terminal screws to the exact specifications printed on the breaker faceplate to ensure a secure connection and prevent overheating.

Ensure the control circuit voltage applied to the auxiliary switch does not exceed the switch rating. Always de-energize both the primary circuit and the control circuit before terminating the 1A-1B contacts to prevent shock hazards.