Truopto 3mm led 12v with resistor truopto osm5dk3131a 12v this warm white 3mm led has a 12v voltage input and an integral current limiting resistor ensuring that the led is ttl compatible having an integral resistor means that component count is reduced giving space saving and reduced cost benefits making this led ideal for use in a wide range of lighting and indicative applications truopto osm5dk3131a 12v 12v 3mm warm white led 3000mcd