BERGSTIK II Unshrouded Header, 32-Position, 0.100" Pitch
The Amphenol FCI 79821-132HLF is a 32-position, dual-row, unshrouded male pin header from the BERGSTIK® II series. It uses the standard 0.100" (2.54 mm) pitch on both the row and position spacing, making it footprint-compatible with the vast majority of 0.100"-pitch IDC sockets and shrouded headers on the market. All 32 positions are loaded with square pins, through-hole solder termination, and a push-pull fastening interface. Rated 5 A per circuit at 110 V, with 30.0 µin (0.76 µm) gold or Gold, GXT™ plating on the mating surface. The gold thickness is substantial enough for repeated mating cycles and signal-level currents without risking contact-resistance drift. The housing is rated UL94 V-0. This is a board-to-board interconnect — the unshrouded pins mate with a receptacle that provides its own alignment and polarization. Typical use is as a general-purpose PCB header for signal or low-power distribution where the mating half is a crimp housing or IDC socket.
What the Key Ratings Mean for Your Fit
The 0.100" (2.54 mm) pitch is the de facto standard for breadboard-compatible headers. It drives the board footprint — every 0.100"-pitch IDC socket or shrouded header with matching position count will align. The 32 positions are fully loaded; there is no option to populate selectively, so the BOM circuit count must match exactly. The 5 A per circuit rating is typical for this pitch class. The limiting factor is the temperature rise of the housing at full load — derate above ambient if running all circuits near the maximum. The 30.0 µin gold on the mating side is a robust plating grade; it handles hundreds of mating cycles without exposing the base metal, unlike thin flash gold that wears through quickly. Unshrouded means the pins are exposed and the header provides no keying. The mating receptacle must supply its own polarization and alignment features. The overall contact length of 0.730" (18.54 mm) includes a 0.430" (10.92 mm) mating section and a 0.200" (5.08 mm) solder post — the post length suits standard 0.062" to 0.093" PCBs.