12-Position Unshrouded Header – 2.54mm Pitch, 3A, Gold Mating Surface
Unshrouded means the header provides no alignment walls – the mating receptacle must supply the lead-in chamfer and retention.
Peer Comparison – 1376779-2
The closest functional second-source within the same series is 1376779-2. Both are 12-position, 2.54mm pitch, through-hole, gold-over-tin headers. The key difference: 1376779-2 carries 8.00µin gold on the mating face versus 30.0µin on this part. For applications with fewer than 50 mating cycles, the thinner gold is adequate; for higher-cycle or corrosive environments, the 30.0µin plating on 9-146281-0-12 gives a longer service life at the contact interface.