The 9-146258-0-04 is an 8-position, dual-row, unshrouded breakaway header from TE's AMPMODU Mod II series. The breakaway design means the 8-position strip can be snapped to a shorter length if the BOM calls for fewer positions — useful when the same base part covers multiple circuit counts across a product family.
Sizing the board footprint and current budget
The row spacing is also 0.100", so the dual-row layout occupies a 5.08mm-wide keep-out zone plus the pin length. The thick tin finish gives good corrosion resistance for moderate mating cycles without the cost of gold. In a signal-level application, the 3 A ceiling leaves plenty of headroom. That short tail works well on a standard 1.6mm-thick PCB; the pin protrudes just enough for a reliable solder fillet without bottoming out against the board.
Mating and termination specifics
There is no shroud wall to guide alignment, so the mating connector must be positioned squarely — the square pins (0.025" square typical for the series) self-align within the socket's chamfer. Termination is solder-only — through-hole pins. No press-fit or surface-mount option on this variant. The tin-plated posts accept lead-free or tin-lead solder; the 100µinch finish provides a good wetting surface.
A buyer cross-shopping the 9-146258-0-04 against the 953440-3 will find two different connector families. The 953440-3 is a 6-position, shrouded, right-angle header with a friction lock, rated for 12V automotive use and a UL94 HB housing. The 9-146258-0-04 is unshrouded, vertical, push-pull, and rated for general-purpose board-to-board or cable duty.