Series cPCI-E2 locks cPCI card in place, or ejects it with press of highly visible pushbutton. It works with 6U and 3U cards in 4HP and 8HP widths. Design incorporates polymer leaf spring rather than metallic spring; chamfered teeth suffer little wear, even after repeated use. Ejector complies with IEEE 1101.10 and PICMG 2.0; maintains ample space for labeling or hot-stamping; and comes with or without hot-swap microswitches, ESD contact, and polarity keying.