The Amphenol FCI 79821-442HLF is a 42-position dual-row unshrouded male header from the BERGSTIK II series, built on the standard 0.100" (2.54 mm) pitch. It's a board-to-board interconnect — through-hole solder termination, push-pull fastening, with all 42 positions loaded.
What the 5 A rating means for this header
5 A per circuit is the headline current for a signal-level header — it's not a power bus connector. The limiting factor here is the tin-plated mating surface, not the contact cross-section. If you need frequent reconnections or a corrosive environment, you'd want gold plating — but that's a different BERGSTIK variant.
The UL94 V-0 flammability rating is on file, and the tin-over-phosphor bronze contact system is a standard, non-exotic build. RoHS compliance is typical for this series but not explicitly stated in the spec record; confirm with the supplier at order time if your compliance audit requires a cert.