JST B2B-XH-A

2-pin · 2.5 mm pitch · top entry board header from JST's XH series — the board-side connector that solders to your PCB. It mates the XHP-2 wire-side housing to form a complete wire-to-board connection.

• Datasheet: JST XH series catalog · JST product page: XH series
• Buy: Mouser · DigiKey

Interactive 3D — watch the connector assemble itself

The 3D viewer above is an animated, looping mate sequence (two columns — KiCad library (left) vs JST manufacturer (right)). On a raised PCB (footprint pads on top, 5 mm above the ground plane) it shows, in slow motion:

1. the board header descending onto the PCB — watch the pins land on the footprint pads to confirm the footprint lines up, then
2. the XHP-2 wire housing sliding into the board header along its real mating axis (straight down — top entry).

Colour tells you the source at a glance: blue = JST manufacturer CAD, tan/grey = KiCad library. Each column is captioned in-scene (JST manufacturer / KiCad library).

The manufacturer models in the viewer are intentionally lossy GLB previews (GLB drops the STEP's parametric detail) — enough to judge fit and footprint alignment. The genuine parametric STEP stays with JST and is one chip-fetcher skill-run away.

The mating system (full cable BOM)

A board header alone is not a connection. To build the cable you also need the wire-side housing that plugs onto this header and the crimp contacts that crimp to your wires and snap into it.

System: 2.5 mm pitch · 3 A max · top entry. Always confirm ratings against the JST datasheet for your build.

Symbol & footprint: ds2sf (JST datasheet) vs KiCad

The ds2sf symbol/footprint are derived from JST's own datasheet; the KiCad ones are the standard-library generics. The viewers below show both so you can compare pad geometry and pin mapping. Pin 1 is the square pad — verify in the footprint viewer before placement.

Provenance & licensing

• Symbol / footprint and the KiCad model inside the bundled comparison 3D: KiCad libraries (Connector_JST, Connector_Generic), redistributable under the KiCad Library License with attribution.
• The JST-coloured models in the scene are lossy preview meshes; the genuine JST manufacturer STEP for the header, the XHP-2 housing, and the crimp contacts — plus JST datasheets — are not rehosted. JST's download agreement (clause 2) prohibits redistributing their original files to third parties; we link to JST and show you how to fetch them yourself via chip-fetcher.