# BAT43WS S8

**Changjiang Electronics Tech (CJ)** · Schottky Barrier Diodes (SBD) · SOD-323

BAT43WS S8 from Changjiang Electronics Tech (CJ), in a SOD-323. 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjiang Electronics Tech (CJ) |
| Package | SOD-323 |
| Category | Diodes |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse breakdown voltage | V(BR) | 30 |  |  | V | IR=10μA | 1 |
| Forward voltage | VF |  |  | 1 | V | IF=200mA | 1 |
| Forward voltage | VF |  |  | 0.4 | V | IF=10mA | 1 |
| Forward voltage | VF |  |  | 0.65 | V | IF=50mA | 1 |
| Forward voltage (both types) | VF |  | 0.26 | 0.33 | V | IF=2mA, both types | 1 |
| Forward voltage (BAT43WS) | VF |  |  | 0.45 | V | IF=15mA | 1 |
| Reverse current | IR |  |  | 0.5 | μA | VR=25V | 1 |
| Capacitance between terminals | CT |  |  | 10 | pF | VR=1.0V, f=1.0MHz | 1 |
| Reverse recovery time | trr |  |  | 5 | ns | IF=IR=10mA, Irr=0.1XIR, RL=100Ω | 1 |
| Peak repetitive peak reverse voltage / working peak reverse voltage / DC blocking voltage | VRRM, VRWM, VR |  |  | 30 | V |  | 1 |
| RMS reverse voltage | VR(RMS) |  |  | 21 | V |  | 1 |
| Forward continuous current | IFM |  |  | 200 | mA |  | 1 |
| Repetitive peak forward current | IFRM |  |  | 500 | mA | t<1.0s | 1 |
| Peak forward surge current | IFSM |  |  | 4 | A | t<10ms | 1 |
| Power dissipation | Pd |  |  | 200 | mW |  | 1 |
| Thermal resistance junction to ambient | RθJA |  |  | 500 | ℃/W |  | 1 |
| Storage temperature | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Junction temperature | TJ |  |  | 125 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `BAT43WS S8`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `bat43ws-s8-etched.step` / `bat43ws-s8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bat43ws-s8.step` / `bat43ws-s8.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjiang Electronics Tech (CJ) datasheet](docs/bat43ws-s8-datasheet.pdf) (2 pp, sha256 `bc15146989a4fca9`, retrieved 2026-11-04, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/bat43ws-s8-datasheet.pdf)