# BAT54S-E3-18

**Vishay Intertech** · Schottky Diodes · SOT-23-3

BAT54S-E3-18 from Vishay Intertech, in a SOT-23-3. 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 | A1 | passive | Anode of the first Schottky diode of the dual series (BAT54S) pair, rated VRRM 30 V and IF 200 mA continuous. |
| 2 | K2 | passive | Cathode of the second Schottky diode of the BAT54S series pair, rated VRRM 30 V and IF 200 mA continuous. |
| 3 | K1/A2 | passive | Common midpoint connecting the cathode of the first diode to the anode of the second diode in the BAT54S dual serial configuration. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Vishay Intertech |
| Package | SOT-23-3 |
| Category | Diodes |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `BAT54S-E3-18`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `bat54s-e3-18-etched.step` / `bat54s-e3-18-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bat54s-e3-18.step` / `bat54s-e3-18.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Vishay Intertech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590406501253603328) (4 pp, sha256 `cf23c27191eed845`, retrieved 2026-10-09, 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/bat54s-e3-18-datasheet.pdf)