# SMDJ180A

**Liown** · ESD And Surge Protection (TVS/ESD) · SMC(DO-214AB)

SMDJ180A from Liown, in a SMC(DO-214AB). 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 | Cathode | passive | Cathode terminal of the unidirectional SMDJ180A (marked by the cathode band on the package), connected to the protected line, with 180V reverse stand-off voltage and 201-222V breakdown at 1mA. |
| 2 | Anode | passive | Anode terminal of the unidirectional SMDJ180A, normally returned to ground, with the cathode clamping at 292V maximum at 10.3A peak pulse current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Liown |
| Package | SMC(DO-214AB) |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `SMDJ180A`
- Footprint: `Diode_SMD:D_SMC`
- 3D model: SMC(DO-214AB) (KiCad packages3D, STEP)
- 3D model files: `smdj180a-etched.step` / `smdj180a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smdj180a.step` / `smdj180a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Liown datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603117594954522624) (6 pp, sha256 `0918f6b52dbfa4fa`, retrieved 2026-10-13, 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/smdj180a-datasheet.pdf)