3mm stacking height for tight mezzanine spacing
The DF12NC(3.0)-10DS-0.5V(51): That dimension is fixed by the housing and contact design — it is not adjustable with different headers. The 0.50mm pitch and 10 positions in 2 rows keep the board footprint compact, but the fine pitch means the PCB layout needs careful trace fan-out — typically a 4-layer board or tighter design rules to route all signals out of the connector footprint.
Gold finish and surface-mount termination
Contacts are gold-plated to 8.00µin, which supports moderate mating cycle counts — enough for production programming or field-service reconnects, but not the thousands of cycles a high-wear application would demand. Surface-mount termination means the connector reflows with the board; no through-hole soldering step. The tape-and-reel packaging suits automated pick-and-place assembly.