Board footprint and orientation
The 178307-2: The 3.81mm pitch and 5.08mm row spacing set the PCB footprint — a 16-position, dual-row layout that routes two signal rows per board edge. Right-angle through-hole mounting places the header parallel to the board, keeping the mated cable assembly low-profile against the PCB.
Mating interface and plating
The shrouded 4-wall housing with detent lock provides keyed alignment and audible latch engagement, reducing mis-mate risk in blind assembly.
ROHS3 compliant; UL94 V-0 rated housing for equipment inside enclosures requiring flame-rated materials.
Comparison with sibling 1-1871673-2
The closest sibling, 1-1871673-2, shares the same right-angle through-hole form and board lock, but uses a 2.50mm pitch and tin-plated mating contacts — a different footprint and lower cycle-life expectation.