The Lumex SSF-LXH103USBD is a 3mm blue LED PCB indicator designed for circuit board applications. It features a 3.5V operating voltage and a bright blue light output. The LED is designed to be mounted on a printed circuit board and is ideal for use in a variety of applications, including arrays, light bars, and bar graphs. The LED is RoHS compliant and is UL recognized. It is also designed to be highly reliable and long-lasting, making it a great choice for any circuit board application.