# BAS21-E3-08

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

BAS21-E3-08 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 | A | passive | Anode of the single silicon epitaxial switching diode (BAS21: VR = 200 V continuous reverse voltage, IF = 200 mA DC forward current). |
| 2 | NC | unconnected | No internal connection; the pin is drawn with no connection to the diode in the SOT-23 circuit diagram. |
| 3 | K | passive | Cathode of the single diode (BAS21: VRRM = 250 V repetitive peak reverse voltage, IFRM = 625 mA). |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `BAS21-E3-08`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `bas21-e3-08-etched.step` / `bas21-e3-08-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bas21-e3-08.step` / `bas21-e3-08.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/8603165948514365440) (4 pp, sha256 `322dea151604b238`, 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/bas21-e3-08-datasheet.pdf)