# BAR43S

**Changjing** · Schottky Diodes · SOT-23

BAR43S from Changjing, in a SOT-23. 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 Schottky diode, whose cathode connects to pin 3 (series pair, BAR43S marking DA5); 30 V peak repetitive reverse voltage, 200 mA average forward current. |
| 2 | K2 | passive | Cathode of the second Schottky diode, whose anode connects to pin 3 (series pair); 30 V peak repetitive reverse voltage, 200 mA average forward current. |
| 3 | A2/K1 | passive | Common midpoint node joining the cathode of the first diode (pin 1) and the anode of the second diode (pin 2) in the series configuration. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `BAR43S`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bar43s-etched.step` / `bar43s-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bar43s.step` / `bar43s.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590902657974415360) (4 pp, sha256 `48d4e9273a4b5eac`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).

[Datasheet PDF](docs/bar43s-datasheet.pdf)