# H12VNT2U

**hongjiacheng** · ESD And Surge Protection (TVS/ESD) · SOT-23

H12VNT2U from hongjiacheng, in a SOT-23. 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 | Pin 1 | passive | One terminal of the uni-directional 12V ESD protection diode; junction capacitance measured Pin 1 to Pin 2 is 60pF typ and 90pF max at VR=0V, f=1MHz. |
| 2 | Pin 2 | passive | Other terminal of the uni-directional ESD diode, paired with Pin 1 for the 60pF typ / 90pF max junction capacitance at VR=0V, f=1MHz. |
| 3 | Pin 3 | passive | Shown as a third pin in the function diagram, but the datasheet does not state its function, polarity or connection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | hongjiacheng |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `H12VNT2U`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `h12vnt2u-etched.step` / `h12vnt2u-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `h12vnt2u.step` / `h12vnt2u.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [hongjiacheng datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756315262121316352) (3 pp, sha256 `c6eca093486c2531`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/h12vnt2u-datasheet.pdf)