Got this from a google:
http://www.bluejeanscable.com/store/component/
"Component Video Cables
Any component video cable, electrically speaking, is just a set of three cables for the Y, Pb, and
Pr components of the signal; but most people prefer their component video cables to come in the form of a single bundle for neatness and ease of installation.
Of the three major analog consumer video signal formats, (composite, s-video, and component video), component video is the best. Component video can be run at any resolution, unlike composite and s-video which are 480i formats, and, as a result of having the color signal split three ways (luminance and two color-difference signals), provides the best color rendition" of the analog formats. "If you're looking for a component video cable to run from a 15-pin VGA plug to three RCA or BNC plugs, visit our VGA to Component Video page."