Impact Guide-Left Header — 60-Position Backplane Signal Connector
The TE Connectivity 2057419-3 is a 60-position header from the Impact series, configured as 6 rows by 10 columns on a 0.075" (1.91mm) pitch. This is the guide-left variant, meaning the alignment key sits on the left side of the connector body when viewed from the mating face — a keying detail that prevents inserting the header into a mismatched backplane slot. It terminates via press-fit compliant pins into a through-hole PCB, which eliminates the thermal stress of wave soldering and allows individual pin replacement in the field.
What the 0.75A and 30V Ratings Mean for Signal Integrity
At 0.75A per contact, this header is designed for logic-level signal paths — think differential pairs, memory buses, or control lines — not for power distribution. The 30VAC/DC rating confirms the same: this is a low-voltage interconnect for backplane card-edge applications. Tin-plated contacts at this pitch would fret and oxidize after a fraction of the cycles.
Press-Fit Termination — Solderless Assembly for High-Density Backplanes
Press-fit termination uses a compliant pin that cold-welds into the plated through-hole when pressed into the board. No solder, no flux, no reflow profile. For a 60-position 6-row header, that means the entire connector can be installed in one press stroke, and a damaged pin can be replaced individually with a removal tool. The through-hole mounting keeps the header mechanically anchored against the insertion force of the mating receptacle — important when the backplane sees multiple card insertions over its life.