# BAT54SFILM

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

BAT54SFILM from STMicroelectronics, 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 | A1 | passive | Anode of the first of two Schottky diodes (D1) connected in series inside the package (BAT54SFILM 'Series' configuration); part of a 40 V VRRM, 300 mA IF Schottky diode pair, top-view pin position bottom-left of the SOT-23 footprint. |
| 2 | K2 | passive | Cathode of the second of two Schottky diodes (D2) connected in series inside the package (BAT54SFILM 'Series' configuration); part of a 40 V VRRM, 300 mA IF Schottky diode pair, top-view pin position bottom-right of the SOT-23 footprint. |
| 3 | K1/A2 | passive | Internal series junction node connecting the cathode of D1 to the anode of D2 (mid-point of the two series-connected 40 V, 300 mA Schottky diodes), top-view pin position on the single-pin side of the SOT-23 footprint. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `BAT54SFILM`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bat54sfilm-etched.step` / `bat54sfilm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bat54sfilm.step` / `bat54sfilm.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/8588884507651293184) (15 pp, sha256 `47b6e3175bbe78ae`, retrieved 2026-09-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-sonnet-5` (text+vision), consensus `claude-opus-4-8` (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/bat54sfilm-datasheet.pdf)