Allen-Bradley 800E-N157B Blue Indicator Light

Allen-Bradley 800E-N157B Blue Indicator Light is a replacement blue LED lamp for Allen-Bradley 800E-series pushbutton indicators, designed to restore illuminated status signaling in legacy control panels. The blue LED provides a distinct visual cue when the associated pushbutton is energized, helping operators quickly confirm active states in busy automation environments. This lamp is specified for 24V AC/DC operation, aligning with typical industrial control circuits, and several listings identify the component as a Series C variant (800E-N157B-C) within the 800E family. It installs inside the existing pushbutton housing and lens, meaning you can refresh the indicator without swapping the entire switch, tray, or bezel. Common applications include machinery start/stop panels, safety interlock circuits, and process lines where blue indicators are used to differentiate a specific function or alarm state from other pilot lights. As a dedicated indicator lamp, it supports consistent color-coded signaling across compatible Allen-Bradley pushbutton ensembles, helping maintain standardized control panel visuals across upgrades or retrofits.