Allen-Bradley 855E-10BR4 Stacklight Base

Allen-Bradley 855E-10BR4 Stack Light Base is a 50 mm light module for Allen-Bradley Control Tower Stack Light assemblies, featuring a red lens and a xenon strobe for high-visibility signaling in industrial environments. Designed as the light element of a modular stack-light system, it operates at 120 V AC full voltage and is sized to stack with compatible bases to indicate status across machines, conveyors, and control panels. This variant is categorized in Rockwell Automation’s 855E family as a red, 50 mm, strobe module and is documented as End of Life with a discontinuation date of December 31, 2025, with the functional replacement being 855E-10GL4. Common applications include signaling STOP or fault conditions, alerting maintenance staff to process interruptions, and providing clear, immediate visual cues for machine states on production lines.