Flame-Rated Housing and Keying Slot
The 52601-S14-4LF: A keying slot is molded into the shroud, preventing insertion of a mismatched plug — useful when multiple similar headers sit on the same board and you need to keep the harnesses straight.
Peer Comparison: 14 vs 16 Positions
The closest sibling is 52601-S16-4LF — identical in pitch (0.100"), shroud (4-wall), plating (gold), and mounting (through-hole), but with 16 positions instead of 14. If your BOM calls for 14 circuits, this is the correct member; the 16-position version adds one more pair of signal or power pins on the same 0.100" row spacing.
