The Amphenol 79425-142HLF is the 42-position member of the BERGSTIK II dual-row male pin header series — a through-hole board-to-board connector built on the industry-standard 0.100" (2.54 mm) pitch. With all 42 circuits loaded, square male pins on 0.100" row spacing, and gold or Gold GXT plating at 30.0 µin (0.76 µm) on the mating interface, this header is configured for signal and moderate-power bus routing where a compact dual-row footprint drives the layout. Rated 5 A per contact and 110 V, the phosphor bronze contact bar carries the current; the black UL94 V-0 housing sets the thermal ceiling for the board stack. The push-pull fastening type and unshrouded pin field make it a drop-in board-to-board stack or daughter-card edge connector for industrial control, instrumentation, and telecom backplane assemblies — not a sealed or keyed plug, but a clean pin-header workhorse that mates with any standard 0.100" pitch dual-row IDC or crimp receptacle in the same position count.
What the key ratings mean for your layout
At 42 positions across two rows on 0.100" pitch, the routing density is manageable for a standard 2.54 mm grid, but verify that your daughter-card or backplane has clearance for the full pin field without crowding adjacent components. The 0.100" insulation height matches the nominal pin pitch, so the header sits flush with the board surface; the 0.120" (3.05 mm) tail length seats the pin through standard PCB material without bottoming out. 5 A per circuit is the headline rating — the phosphor bronze bar carries that comfortably at board-level temperatures, and the 110 V rating keeps the creepage distance clear for most industrial logic-level and power-distribution rails on a 2.54 mm pitch. The UL94 V-0 housing material is the limiting factor for the thermal ceiling, not the contact itself — derate current if the header sits in a fully loaded, high-ambient slot.