The Amphenol FCI 91276-428HLF is a 28-position unshrouded single-row male header from the BERGSTIK II series, on the standard 0.100-inch (2.54 mm) pitch. It uses through-hole solder termination with a 0.225-inch (5.72 mm) post length and a full 0.900-inch (22.86 mm) mating pin length, making it a straight-fit for breadboard or perfboard layouts where the pin length clears a double-sided board or a mating IDC socket. Tin-plated phosphor bronze contacts carry 5 A per circuit at 110 V — typical for signal-level interconnects and low-power distribution, not bus-level power rails. The black UL94 V-0 housing and push-pull fastening keep it simple: no latch, no shroud, just a straight pin row that relies on the mating half for alignment.
What the 0.100-inch pitch and 28 positions mean for your board
The 0.100-inch (2.54 mm) pitch is the de facto standard for prototyping and legacy digital logic — every 0.100-inch IDC socket, ribbon cable header, and perfboard grid expects this spacing. The 28 positions are fully loaded (all positions populated), so the BOM line count matches the circuit count exactly. The unshrouded design means the mating receptacle must provide its own alignment key; common mates are the matching BERGSTIK II receptacle or a standard 0.100-inch IDC socket. Tin plating on both the mating and post surfaces keeps cost low but limits mating cycles — expect a few hundred mates before contact wear becomes noticeable, fine for a permanent or occasional-service connection.
Sourcing and lifecycle
The 91276-428HLF carries an Active lifecycle status — full production, no end-of-life notice. No official replacement or cross-reference is on record — the part is the current production version.