IDEC UPQN406L-S is a blue lens accessory designed for optoelectronic applications. This component, part of IDEC's accessory line, is supplied in bulk packaging for high-volume integration. It is specifically intended for use with the UPQNE4 series of products, providing a critical component for optical signaling and indication systems. Its robust construction and precise optical properties make it suitable for industrial control panels, automation equipment, and general signaling within harsh environments. The UPQN406L-S facilitates visual feedback in a broad range of electro-mechanical assemblies and control systems where clear and distinct color indication is paramount.