The ABBG A3L4AA-6L4G is a green LED pilot light from the A3 series, designed for 120 VAC panel indication. It signals that a circuit or machine state is active — common on control panels, MCC buckets, and operator stations where a quick visual status check is needed.
What the green LED at 120 V means on the line
The 120 V green LED draws minimal current — typically under 20 mA — so it won't load the control transformer or cause a voltage drop on the signal loop. The green lens indicates a normal or running state per standard panel color conventions (green = on / run, red = fault).