The '030' indicates 30 positions per row, and '05.0' refers to a specific lead style with dimensions A = 4.61 mm (.181") and B = 8.91 mm (.351"). The first '-L' specifies 10µ" (0.25 µm) Gold plating on the contact and Matte Tin on the tail. '-DV' is a standard designator for the Edge Rate® Rugged High Speed Terminal. The second '-L' indicates a latching feature. '-K' is an additional option, and '-TR' denotes Tape & Reel packaging. The ERM8 series identifies a 0.80 mm pitch Edge Rate® Rugged High-Speed Terminal connector from Samtec.