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ESDAULC45-1BF4
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STMicroelectronics ESD And Surge Protection (TVS/ESD), 0201. Pinout settled in review by an AI reviewer against the manufacturer's datasheet, KiCad symbol/footprint/3D.
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README.mdadded+43@@ -0,0 +1,43 @@+# ESDAULC45-1BF4++**STMicroelectronics** · ESD And Surge Protection (TVS/ESD) · 0201++ESDAULC45-1BF4 from STMicroelectronics, in a 0201. 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 | I/O_1 | passive | Bidirectional ESD protection terminal 1. Identified on the package by the pin-1 bar marking (see Figure 20). Connect to the protected data line or to ground; either terminal may be tied to line or ground since the TVS is bidirectional (VBR = 5.8 V min, VRM = 3 V, CLINE = 1.5 pF typ.). |+| 2 | I/O_2 | passive | Bidirectional ESD protection terminal 2. Opposite end of the TVS from pin 1. Connect to the protected data line or to ground; either terminal may be tied to line or ground since the TVS is bidirectional (VBR = 5.8 V min, VRM = 3 V, CLINE = 1.5 pF typ.). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | 0201 |+| Category | Circuit Protection |+| Pins | 2 |++## Ordering variants++Same part, different packaging or reel option.++- `ESDAULC5-1BF4`++## CAD (KiCad official)++- Symbol: `ESDAULC45-1BF4`+- Footprint: `Resistor_SMD:R_0201_0603Metric`+- 3D model: 0201 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589040673996099584) (None pp, sha256 `b9811d5275f131b1`, retrieved 2026-08-17, tier: lcsc)+- **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/esdaulc45-1bf4-datasheet.pdf)
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