The SM02B-LEASS-TF(LF)(SN): It uses a 0.071" (1.80mm) pitch, which sets the board footprint for the matching receptacle.
This header mates with the JST LEA series receptacle housing (order separately) that accepts the appropriate crimp terminals. The solder retention feature — small plastic posts or barbs — keeps the header aligned during the reflow pass before the solder joints solidify.
What the 1.80 mm Pitch Means for Your Layout
The 1.80 mm pitch is tighter than the common 2.54 mm (0.100") header pitch, so the board footprint is narrower — useful when routing density is a constraint. The 2-position count is the smallest in the LEA series; if your BOM calls for more circuits, the series runs up to 15 positions at the same pitch, keeping the same receptacle family and terminal tooling.