This 4-position version sits between the 2-position (77311-818-02LF) and 6-position (77311-818-06LF) siblings in the same BERGSTIK® single-row unshrouded line. If the BOM calls for 6 circuits, the 77311-818-06LF is a direct footprint match; if 2, the 77311-818-02LF fits the same pattern. No shrouding or keying — the header is a bare pin strip, so the mating receptacle must have its own polarization guide. The push-pull fastening means the connector pair separates under cable tension without a secondary latch, which is typical for internal board-stacking or low-vibration environments.
The 0.230" mating pin length engages standard box-type receptacles with full contact wipe. Termination is solder to through-hole pads — the 0.120" post length fits a 1.6mm (0.063") board thickness with enough protrusion for a visible solder fillet.