The IDEC RU42S-D-D110 is a 4PDT plug-in relay designed for versatility and environmental consideration. It features a non-polarized LED indicator, mechanical flag indicator, and snap-on yellow marking plate for easy identification. The relay boasts lead-free construction with cadmium-free contacts, ensuring eco-friendly operation. It meets industry standards being UL Recognized, CSA Certified, and EN Compliant, suitable for a wide range of applications.