12-position board-to-cable header for wire harness termination
The B12B-XASK-1 is a JST XA series header that connects a PCB to a wire harness — it's the board-side male half of a wire-to-board interconnect.
Pitch, current, and termination — fitting the BOM
At 2.50 mm pitch, this header is a common industrial footprint that balances current capacity with board density. Each contact is rated 3 A at 250 V — enough for signal circuits and low-power loads like indicator lamps, sensors, or small relays. The termination accepts both press-fit and solder assembly. Press-fit avoids the thermal stress of reflow and allows contact rework; solder gives a stronger mechanical anchor. Either way, the through-hole mounting holds the header securely against cable strain.