What this connector is
The Amphenol BERGSTIK 75844-101-20LF is a dual-row 0.100-inch (2.54 mm) pitch male breakaway header rated 5 A per circuit at up to 110 V. It accepts through-hole soldering on a 0.100-inch grid, with a push-pull fastening type that holds the mating half without a separate locking clip. All 20 positions are populated; contacts are square-pin phosphor bronze with 30 µin (0.76 µm) gold GXT plating on the mating surface. The insulation body is black UL94 V-0 rated thermoplastic, with a 0.100-inch (2.54 mm) insulation height and a 0.225-inch (5.72 mm) mating contact length. Overall contact length is 0.425 inch (10.80 mm), spanning the full board thickness for through-hole applications. Operating temperature runs from -65 °C to 130 °C — wide enough for most industrial and telecom backplane environments.
What it is used for
Board-to-board or cable interconnect on a standard 0.100-inch grid. The unshrouded breakaway body lets you snap off individual pins or groups to match non-standard circuit counts, which is why this series shows up in legacy industrial control panels and legacy telecom backplane cards where the original design predates surface-mount pitches. The wide thermal range suits equipment that runs hot or cold — industrial enclosures without active temperature control, or outdoor cabinet installations.
What the ratings mean for your BOM
Five amps per circuit is the per-contact limit — the gold GXT plating holds contact resistance low across hundreds of mating cycles without the fretting risk that thin plating carries on higher-current switching cycles. The 110 V rating is adequate for signal and control bus applications at SELV levels. Confirm this against your circuit voltage requirements.
Sourcing
Listed as Active with no stated obsolescence and no documented successor order code. The 75844 base product number identifies the series — confirm with the manufacturer that your target date and volume are within their standard production horizon.