ABB CL2-520Y Industrial Control Relay Assembly

ABB CL2-520Y is a compact 22 mm LED pilot light (monoblock) designed for industrial control panels, delivering a bright yellow status indication when powered from 220 V DC. The device is referenced by ABB part number 1SFA619403R5203 (CL2-520Y) and is intended as a panel-mounted indicator for signaling and status feedback in automation cabinets, machine controls, and other control-relay assemblies where a clear visual cue is essential. Industry catalogs and distributors describe it as a 22 mm mounting indicator with a yellow LED that operates on 220 V DC, making it compatible with ABB's 22 mm pilot device family across control panels and PLC interfaces. In rugged environments, multiple listings note an IP66-rated seal for this model, enabling use in humid or dusty industrial cabinets while providing a durable signal to operators.