# BAR43SFILM

**STMicroelectronics** · Schottky Diodes · SOT-23-3L

BAR43SFILM from STMicroelectronics, in a SOT-23-3L. 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/K2 | passive | Internal series mid-point tying the anode of one BAR43 Schottky die (A1) to the cathode of the second die (K2); this is the top-left lead of the SOT23-3L outline for the BAR43SFILM 'series' variant, per Figure on page 1. |
| 2 | A2 | passive | Anode of the second (outer) BAR43 Schottky diode in the series pair; bottom-left lead of the SOT23-3L outline for BAR43SFILM, per Figure on page 1. |
| 3 | K1 | passive | Cathode of the first (outer) BAR43 Schottky diode in the series pair; single right-side lead of the SOT23-3L outline for BAR43SFILM, per Figure on page 1. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23-3L |
| Category | Diodes |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `BAR43SFILM`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `bar43sfilm-etched.step` / `bar43sfilm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bar43sfilm.step` / `bar43sfilm.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905236982845440) (7 pp, sha256 `e965d2b77f22fd7d`, retrieved 2026-09-29, 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/bar43sfilm-datasheet.pdf)