12-Position, 2.50 mm Pitch, 3 A — BOM Fit for Wire-to-Board
The S12B-XASK-1(LF)(SN): This is a JST XA series 12-position single-row header, pitched at 2.50 mm between contacts, rated 3 A per circuit at 250 V. The 12 circuits and 2.50 mm pitch set the board footprint — confirm your BOM position count and PCB hole pattern match before committing. That covers most indoor and sheltered outdoor equipment — think control panels, appliances, and automotive interior modules where the ambient stays below 85°C.
Right-Angle Mount with Board Lock — PCB Layout and Assembly
The header mounts through-hole, right-angle to the board. No secondary fastener needed for most applications. For higher cycle life or harsh atmospheres, the XA series also offers gold-plated variants — check the base product number S12B-XAS for options.
The base product number is S12B-XAS, which covers the full family of 12-position XA headers. The (LF)(SN) suffix indicates lead-free and tin-plated contacts.