What the 79821-102HLF Is
The Amphenol 79821-102HLF is a dual-row, board-to-board header in the BERGSTIK II series — a 0.100-inch (2.54 mm) pitch family widely used in industrial control, instrumentation, and backplane applications where a compact, through-hole interconnect is the standard form factor. It carries 2 positions loaded across 2 rows, male square-pin contacts, and mates by push-pull push-pull fastening — no locking arm, no screw, just a firm seated fit that holds under vibration when the PCB footprint and slot are cut to spec. Contact finish is gold or Gold GXT at 30.0 µin (0.76 µm) on the mating side. The base metal is phosphor bronze, and the black housing meets UL94 V-0. Rated 5 A per contact at the rated voltage of 110 V. Insulation height above the board is 0.100 inch (2.54 mm) — this is the post-reflow standoff that determines whether the connector clears surface-mount components beneath it when the board drops into a panel or harness enclosure.
Sourcing and Lifecycle
Listed Active for this 2-position member. The 79821 base product number is the search anchor if you need to browse other BERGSTIK II position counts in the same series.
Compliance Angle
UL94 V-0 flammability on the housing is the primary listed compliance fact. Phosphor bronze contacts give the spring a material edge over brass in terms of fatigue life under repeated mating — relevant when this header sees field service cycles. No RoHS, REACH, or UL recognition number is listed in this spec record; request the full technical file from Amphenol if your quality system requires a document number for the test report.