BAS31

@@ -0,0 +1,44 @@+# BAS31++**Nexperia** · Avalanche Diodes · SOT-23++BAS31 from Nexperia, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | A | passive | Anode of the first diode. Series path is A (pin 1) -> diode -> CC (pin 3) -> diode -> K (pin 2). VF max 1.25 V at IF = 400 mA (Tj = 25 C). |+| 2 | K | passive | Cathode of the second diode. Continuous reverse voltage max 90 V; repetitive peak reverse voltage max 110 V. |+| 3 | CC | passive | Common connection between the cathode of the first diode and the anode of the second diode, forming a series-connected double diode. Available as a shared node for the two switching diodes. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Nexperia |+| Package | SOT-23 |+| Category | Diodes |+| Pins | 3 |++## Ordering variants++Same part, different packaging or reel option.++- `BAS31`++## CAD (KiCad official)++- Symbol: `BAS31`+- Footprint: `Package_TO_SOT_SMD:SOT-23`+- 3D model: SOT-23 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/BAS31.pdf) (9 pp, sha256 `09c8e51b0edffd81`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/bas31-datasheet.pdf)

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