ABB KSB-401R Relay

ABB KSB-401R is a red permanent signal beacon in ABB’s KSB signaling lineup, designed to deliver clear, continuous visual indication for industrial equipment and control panels. It uses a BA15d 52 mm lamp base and is offered as a red beacon with the bulb not included, allowing you to select the appropriate lamp type for your installation. The unit is specified for a wide supply range of 12–240 V AC/DC (bulb compatibility established by the BA15d base), making it suitable for both low- and high-voltage control circuits in manufacturing and process environments. Color variants exist in the KSB-401 family (e.g., R4012 green, R4013 yellow, R4014 blue, and R4018 clear), with 1SFA616080R4011 denoting the red beacon configuration; this versatility supports multi-color signaling schemes on the same platform. Designed for panel-mounted signaling and signaling towers/beacons ecosystems, the KSB-401R is commonly used to indicate machine status, alarms, or safety-related alerts across automation and control systems.