WERMA 644-500-75 LED Stack Light Industrial Blue

WERMA 644-500-75 LED Stack Light (Blue) provides immediate visual status indication for automation and control systems. Part of the KombiSIGN 71 (KS71) family, this LED permanent stack light element delivers continuous signal in signal towers, production equipment, and industrial control panels. It operates at 24 VAC/DC (50 Hz) and draws a nominal 25 mA with up to 100 mA inrush, and its blue LED configuration is housed in polycarbonate to endure industrial environments. The unit measures 66 mm in height and 70 mm in diameter and is designed for modular signal tower assemblies, with IP65 and UL Type 12 protection for reliable operation in dusty or damp settings. It carries a service life of up to 50,000 hours, ensuring long-term visibility with low maintenance. Manufactured in DE-78604 Rietheim-Weilheim, Germany, the part numbers 645 820 75 and 644-500-75 reflect its role as a dedicated LED light element within WERMA’s KS71 line. Common applications include manufacturing facilities, automation systems, packaging machinery, process equipment, and industrial workstations where clear, bright signaling supports operator awareness and maintenance workflows.