component
BAS21SW
Public Made by Adomby adom
YFW Switching Diodes, SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBAS21SW
YFW · Switching Diodes · SOT-323
BAS21SW from YFW, in a SOT-323. 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 diode of the series pair in the BAS21SW dual high-voltage switching diode (BAS21W type: VR 250 V, IF(AV) 200 mA). |
| 2 | K2 | passive | Cathode of the second diode of the series pair in the BAS21SW dual high-voltage switching diode (VR 250 V, IF(AV) 200 mA per diode). |
| 3 | K1/A2 | passive | Common junction node between the cathode of the first diode and the anode of the second diode (series connection), shown as the top pin of the package. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | SOT-323 |
| Category | Diodes |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
BAS21SW - Footprint:
Package_TO_SOT_SMD:SOT-323_SC-70 - 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files:
bas21sw-etched.step/bas21sw-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bas21sw.step/bas21sw.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: YFW datasheet (3 pp, sha256
93f6cc869491e66a, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).