# JST B2B-PH-K-S

**2-pin · 2.0 mm pitch · top entry** board header from JST's **PH series** —
the **board-side** connector that solders to your PCB. It mates the **PHR-2** wire-side housing
to form a complete wire-to-board connection.

- **Datasheet:** [JST PH series catalog](https://www.jst-mfg.com/product/pdf/eng/ePH.pdf) · **JST product page:** [PH series](https://www.jst-mfg.com/product/index.php?series=199)
- **Buy:** [Mouser](https://www.mouser.com/c/?q=B2B-PH-K-S) · [DigiKey](https://www.digikey.com/en/products/result?keywords=B2B-PH-K-S)

## 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 **PHR-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.

| Role | Part | Key spec | Source |
|---|---|---|---|
| **Board header** (this page) | **B2B-PH-K-S** | 2-pin, 2.0 mm, 2 A | JST STEP (gated) · KiCad sym+fp |
| **Wire housing** | **PHR-2** | 2-circuit | JST STEP (gated) |
| **Crimp contact** | `SPH-002T-P0.5S` or `SPH-002T-P0.5L` | AWG #30–24 | JST (gated) |

System: 2.0 mm pitch · 2 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 **PHR-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](https://wiki.adom.inc/adom/adom-chip-fetcher).