The IDEC RU42S-C-A110 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 with additional options available. The relay's lead-free construction and cadmium-free contacts highlight its eco-friendly design. For safety and quality assurance, it is UL Recognized, CSA Certified, and EN Compliant.