030 specifies 30 positions per row; 05.0 specifies the lead style, which relates to the mated height; S specifies 30µ" (0,76 µm) Gold plating on the contact and Matte Tin on the tail; DV is an 'other option'; K specifies a (4,00 mm) .157" diameter 'other option'. TR specifies Tape & Reel packaging. Rugged High Speed Header™ connector series from Samtec.