IDEC UPQN406L-Y, a rectangular yellow lens accessory designed for optoelectronic applications. This component, supplied in bulk packaging, serves as a crucial visual indicator for illuminated pushbutton switches. It is specifically engineered for use with IDEC's UPQNE4 series of illuminated pushbuttons, ensuring precise fit and optimal light transmission. The durable construction and distinct yellow color make it suitable for clear status indication in industrial control panels, automation systems, and various machine interface applications where reliable visual feedback is paramount. Its design prioritizes clarity and longevity in demanding operational environments.