Square D DL1CJUS0243 Light Emitting Diode Bulb

The DL1CJUS0243 is a green LED bulb designed as the signaling lamp for Square D Harmony XB4 pilot devices, using a BA9s base and compatible with 24 V AC or 24 V DC signaling circuits to provide a green indication in control panels and industrial enclosures. Intended for Harmony XB4 assemblies, this LED bulb fits the BA9s lamp holder used by the XB4 signaling family, serving as the LED replacement for traditional pilot lights and enabling consistent color signaling across a panel. Operation at 24 V AC or DC and the green color make it a standard choice for status indicators in automation, with applications on cabinet doors, machine control panels, and signaling modules that require clear illumination. Because the part number DL1CJUS0243 identifies the green LED lamp for the XB4 line, it is commonly sought by electrical distributors and integrators replacing pilot-light lamps in Square D installations and other industrial environments.