# B5819WS

**FUXINSEMI** · Schottky Barrier Diodes (SBD) · SOD-323(SC-90)

B5819WS from FUXINSEMI, in a SOD-323(SC-90). 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 | FUXINSEMI |
| Package | SOD-323(SC-90) |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak repetitive reverse voltage | VRRM |  |  | 40 | V |  | 1 |
| RMS reverse voltage | VR(RMS) |  |  | 28 | V |  | 1 |
| Average rectified output current | IO |  |  | 1 | A |  | 1 |
| Peak forward surge current | IFSM |  |  | 30 | A | @=8.3ms | 1 |
| Power dissipation | Pd |  |  | 250 | mW |  | 1 |
| Thermal resistance junction to ambient | RΘJA |  |  | 500 | K/W |  | 1 |
| Operating junction temperature range | TJ | -55 |  | 150 | C |  | 1 |
| Storage temperature | TSTG | -55 |  | 150 | C |  | 1 |
| Forward voltage | VF |  |  | 0.6 | V | IF=1A | 1 |
| Forward voltage | VF |  |  | 0.9 | V | IF=3A | 1 |

## CAD (KiCad official)

- Symbol: `B5819WS`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323(SC-90) (KiCad packages3D, STEP)
- 3D model files: `b5819ws-etched.step` / `b5819ws-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `b5819ws.step` / `b5819ws.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FUXINSEMI datasheet](docs/b5819ws-datasheet.pdf) (2 pp, sha256 `feec2b631f4ede4b`, retrieved 2026-10-21, 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/b5819ws-datasheet.pdf)