The unshrouded design (no plastic shroud around the pins) means the mating connector must be keyed by the PCB layout, not by the header itself. The through-hole solder tails (0.159" post length) provide a mechanically robust joint that resists shear from cable strain better than an SMT equivalent.
The part is RoHS-compliant per the LF suffix in the order code.
Board Layout and Mating Compatibility
Mates with standard 0.100-inch pitch IDC sockets (e.g., 3M, TE, Amphenol) or discrete crimp housings that accept 0.025" square pins.