# B3B-XH-A

**JST** · Wire To Board Connector · 插件,P=2.5mm

B3B-XH-A from JST, in a 插件,P=2.5mm. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1 | passive | Circuit 1 of the 3-circuit header, a 0.64 mm square post at 2.5 mm pitch, rated 3 A AC/DC (AWG #22) and 250 V AC/DC. |
| 2 | 2 | passive | Circuit 2 of the 3-circuit header, a 0.64 mm square post at 2.5 mm pitch, rated 3 A AC/DC (AWG #22) and 250 V AC/DC. |
| 3 | 3 | passive | Circuit 3 of the 3-circuit header, a 0.64 mm square post at 2.5 mm pitch, rated 3 A AC/DC (AWG #22) and 250 V AC/DC. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JST |
| Package | 插件,P=2.5mm |
| Category | Connectors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `B3B-XH-A`
- Footprint: `Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical`
- 3D model: 插件,P=2.5mm (KiCad packages3D, STEP)
- 3D model files: `b3b-xh-a-lf-sn-etched.step` / `b3b-xh-a-lf-sn-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `b3b-xh-a-lf-sn.step` / `b3b-xh-a-lf-sn.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [JST datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588890631616151553) (5 pp, sha256 `389be59ed37c4790`, retrieved 2026-10-08, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/b3b-xh-a-lf-sn-datasheet.pdf)