What ships in the carton
The 3RA9012-5CG58 is a GM-SET / ITEM NUMBER 12879 light and alarm LED-stack module kit — red, 24 VDC, consisting of the light module and LED. This is the complete assembly, not a loose lens or bare PCB: the kit includes the module housing and the integrated LED, ready to snap onto the SIRIUS 3RA2 or 3RA6 motor starter base unit.
What this LED-stack module does on a motor starter
This module mounts directly onto the SIRIUS 3RA2 or 3RA6 motor starter — it provides a local visual alarm indication (red LED) at 24 VDC. The stack design means multiple modules can be stacked vertically for multi-status indication (run, fault, alarm). The 24 VDC supply is drawn from the starter's control circuit, so no separate power supply is needed for the indicator.