What this connector is
The Amphenol ICC 79821-440HLF is the 40-circuit member of the BERGSTIK II dual-row header series, built on the 0.100" (2.54mm) pitch grid. It is an unshrouded male pin header with square pins rated 5 A per circuit, voltage-rated at 110 V, and carries a UL94 V-0 black thermoplastic housing. All 40 positions are loaded. Insulation height is 0.100" (2.54mm), matching the pitch, so board-to-board stacking follows the standard 2.54mm grid — the header sits flush on the board surface with no additional standoff feature. The push-pull fastening type refers to the pin-to-receptacle mating action; there is no latch or clip — retention is contact friction plus the mating connector's housing.
Where it is used
Board-to-board signal and low-power interconnect — the 40-position dual-row footprint accommodates parallel signal buses, discrete wiring harnesses routed to a board edge, or IDC ribbon-cable termination points in industrial automation equipment, instrumentation, and enclosed panels. The UL94 V-0 housing confirms it is qualified for equipment enclosures where flame retardancy is required. As an unshrouded header, it mates with the matching BERGSTIK II IDC receptacle or any 2.54mm pitch dual-row socket housing with square-pin compatibility — the square pin profile locks into square-socket contacts and resists rotation under vibration. The push-pull mating style suits applications where the harness connector is assembled and disassembly cycles are controlled.