The 521-9946F is a 5 mm discrete blue LED designed for general-purpose indicator and display applications. It features a single-color blue output with a luminous intensity range of 520 to 1500 mcd, operating at a forward current of 30 mA. The device is housed in a standard 5 mm LED package configuration and is RoHS compliant, ensuring environmental compliance for modern electronics. This LED is commonly used in status indicators, panel displays, and consumer electronics where reliable blue illumination is required.