Electronics Co LtdThe 91-21SURC/S530-A2/TR10 is an electronic part manufactured by Everlight Electronics Co Ltd and features light emitting diodes (LEDs) in the red 624nm wavelength. It has a surface mount, which is designed to be mounted directly onto a printed circuit board (PCB). It is also RoHS compliant, meaning that it meets all the requirements set out in the Restriction of Hazardous Substances (RoHS) Directive.