0.150" pitch, 6 circuits, right-angle exit
The 3-178137-2 is a 6-position, 2-row header from TE's Dynamic D-3100 series, with a 0.150" (3.81mm) mating pitch and 0.300" (7.62mm) row spacing.
Gold mating surface and board lock for industrial duty
The detent lock provides a positive tactile mate without requiring a secondary latch — the connector stays mated under moderate vibration but can still be unmated by hand.
Wider pitch than the 2.50mm sibling
Compared to the 1-1871673-2 (same series, 0.098" / 2.50mm pitch, 4 positions, tin-plated contacts), the 3-178137-2 offers a wider 3.81mm pitch and gold plating. The wider pitch gives more PCB routing space between pads and higher voltage creepage — a practical advantage when the board layout has mixed-signal or higher-voltage traces. The gold contacts also support more mating cycles than tin.