The 4-1971906-2: This is a 4-position, dual-row vertical header from the Grace Inertia GIC series, designed to connect a cable-mounted receptacle to a PCB. The 3.30mm pitch and 5.20mm row spacing set the board footprint — wider than the common 2.54mm pitch, which gives more room for trace routing between pins and supports higher current per contact.
The 3.30mm mating pitch is the centre-to-centre distance between adjacent pins in a row. For a 4-position, 2-row layout, the footprint spans 3.30mm × (4/2 - 1) = 3.30mm between the two pins in each row, with 5.20mm between rows. The through-hole termination uses kinked pins with a 3.00mm post length — the kink provides retention during soldering before the solder solidifies.
Mating half and latch system
This header mates with a Grace Inertia GIC series cable receptacle (not included).