The 95278-401A40LF: For applications requiring hundreds of cycles, a gold-plated sibling (e.g., 95278-101A08LF with 30 µin gold) would be the better choice.
Surface Mount Assembly and Pick-and-Place
The header is terminated by solder to surface-mount pads, and the package includes a pick-and-place feature for automated placement. The UL94 V-0 thermoplastic housing withstands reflow temperatures without deformation. The unshrouded profile means no extra z-height is consumed by a shroud, which helps in tight board-to-board spacing.
Peer Comparison: Gold vs Tin Mating Finish
The 95278-101A08LF is a direct peer from the same series with 8 positions and gold (GXT™) mating finish at 30 µin. The gold contact is rated for higher mating cycle life (500+ cycles) compared to the tin finish on the 95278-401A40LF. For a 40-position design that needs frequent board swaps, the gold version is the upgrade path — but the tin version is cost-effective for one-time or low-cycle assembly.