The '030' indicates 30 pins per row. The '03' specifies the lead style, corresponding to a height of 10.27 mm (.404") or 11.00 mm (.433") when mated with QSH. The 'L' denotes 10 µ" (0.25 µm) Gold plating on Signal Pins and Ground Plane, with Matte Tin on tails. The 'D' signifies a Single-Ended type. 'A' is a standard part of the base configuration. The 'K' indicates a (7.00 mm) .275" DIA. Polyimide film Pick & Place Pad. The 'TR' specifies Tape & Reel packaging. Identifies the Samtec QTH series, which are High-Speed Ground Plane Headers.