# S1G

**TWGMC** · Diodes - General Purpose · SMA(DO-214AC)

S1G from TWGMC, in a SMA(DO-214AC). 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 rectifier; the polarity symbol marked on the body identifies this lead. |
| 2 | Anode | passive | Anode terminal of the rectifier, opposite the cathode lead in the S1A THRU S1M general rectifier. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TWGMC |
| Package | SMA(DO-214AC) |
| Category | Diodes |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `S1G`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files: `s1g-etched.step` / `s1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `s1g.step` / `s1g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TWGMC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588915805140488193) (3 pp, sha256 `0b626e3b62acd896`, retrieved 2026-10-12, 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/s1g-datasheet.pdf)