The OPS-S5621LY is a LED surface mount device (SMD) manufactured by Opto Plus Led Corp. It features a 7-segment display that is 14.2mm in length and has a bright yellow color with 10-50 mcd of brightness. It has a cathode pin that is used for connecting the device to a circuit. The device is suitable for use in a variety of applications including industrial controls, medical devices, consumer electronics, and more.