# BAT54AFILM

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

BAT54AFILM 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 | K1 | passive | Cathode of diode 1 of the common-anode pair; blocks up to VRRM = 40 V reverse and conducts up to IF = 300 mA continuous forward current (IFSM = 1.25 A, 10 ms surge). |
| 2 | K2 | passive | Cathode of diode 2 of the common-anode pair; blocks up to VRRM = 40 V reverse and conducts up to IF = 300 mA continuous forward current (IFSM = 1.25 A, 10 ms surge). |
| 3 | A | passive | Common anode terminal shared by both Schottky diodes, carrying the combined forward current with VF up to 900 mV typical at IF = 100 mA. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `BAT54AFILM`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bat54afilm-etched.step` / `bat54afilm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bat54afilm.step` / `bat54afilm.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/8586200491700703232) (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/bat54afilm-datasheet.pdf)