EI series 4-position header for wire-to-board latching
The 2-171825-4: The single-wall shrouding (0.409" insulation height) exposes the back of the pins for visual inspection while the latch holder secures the cable plug — a practical compromise for harness builders who need both retention and access.
Through-hole solder termination with 31.5 µin tin finish
Compared to the 3-position sibling 2-171825-3, this 4-position version adds one circuit in the same 2.50 mm pitch footprint — the BOM line fits a 4-wire harness where a 3-position would leave a wire unconnected. The natural-color housing alternative 171825-4 shares identical electrical ratings and dimensions — the difference is insulation color (black vs natural), not fit or function.