20-Position Unshrouded Header at 2.54 mm Pitch
The 10129381-920003BLF: It is a through-hole solder termination part, cuttable strip style — you can break it to a custom position count if the BOM calls for fewer than 20 circuits. The gold flash is rated for limited mating cycles — suitable for low-cycle board-to-wire interconnects where the connector is mated infrequently.
Sourcing and Lifecycle: Active Production
The part is packaged in bulk, not tape-and-reel, so it is suited for low-to-medium volume builds or hand-loading.