The DIALIGHT 521-9284F is a 5mm diffused yellow LED with an integrated resistor, designed for ease of use and reduced component count in electronic circuits. It's ideal for applications requiring a constant current source, such as indicator lights, panel illumination, and backlighting. The LED operates reliably within a temperature range of -40°C to +85°C and is designed to meet MIL-STD-202E soldering requirements. Its diffused lens provides a wider viewing angle and more uniform light distribution.