# BAT54WS-7-F

**Diodes Incorporated** · Schottky diode, small signal · SOD-323

Diodes Incorporated single 30 V, 200 mA small-signal Schottky diode in SOD-323 (marking L9). Fast switching with a low forward voltage: detectors, clamps and reverse-polarity protection.

## Verification

A person checks each page against its datasheet and signs it off here; the badge turns amber if a checked file changes.

::adom-verified{src="/adom/bat54ws-7-f/render/verification.json"}

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K | passive | Cathode, the banded end (datasheet p.1, "Polarity: Cathode Band"). |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value | Source |
|---|---|---|
| Reverse voltage | 30 V | Datasheet p.2 |
| Forward continuous current | 200 mA | Datasheet p.2 |
| Average rectified current | 100 mA | Datasheet p.2 |
| Forward surge current | 600 mA (t < 1 s) | Datasheet p.2 |
| Forward voltage | 1 V max at 100 mA | LCSC listing (2026-10-08) |
| Reverse recovery time | 5 ns | Datasheet p.2 |
| Marking | L9 | Datasheet p.1 |

## Ordering

| Distributor | Part number | Note |
|---|---|---|
| LCSC / JLCPCB | [C124205](https://www.lcsc.com/product-detail/C124205.html) | JLC Extended part, 62,790 in stock on 2026-10-08 |
| Mouser | [621-BAT54WS-F](https://www.mouser.com/en/ProductDetail/Diodes-Incorporated/BAT54WS-7-F?qs=BJo294706GxanB6a%2FKrrdw%3D%3D) | |
| DigiKey | [BAT54WS-FDITR-ND](https://www.digikey.com/en/products/detail/diodes-incorporated/BAT54WS-7-F/804865) | |

## CAD

| File | What it is |
|---|---|
| `bat54ws-7-f.kicad_sym` | KiCad symbol, with MPN, manufacturer and distributor numbers as properties |
| `bat54ws-7-f.kicad_mod` | KiCad footprint: `Diode_SMD:D_SOD-323`, KiCad official, CC-BY-SA 4.0 |
| `bat54ws-7-f.step` / `bat54ws-7-f.glb` | 3D model, Z-up, seated on z = 0: KiCad packages3D (tag 10.0.6), D_SOD-323.step |
| `bat54ws-7-f-etched.step` / `bat54ws-7-f-etched.glb` | The same model with the part number laser-etched on top as a separate, toggleable `Adom.LaserEtch` group (a virtual identification aid, not the maker's real marking) |
| `bat54ws-7-f.lbr` | Fusion 360 / EAGLE library: one deviceset, each with its own MPN, manufacturer and LCSC / Mouser / DigiKey attributes |
| `altium/Adom_bat54ws_7_f.SchLib` / `.PcbLib` | Altium library pair (adom-lbr, no Altium needed): symbol and footprint with the 3D body, parameters carry the part numbers; `altium/*.adom-lbr.json` is the canonical hub each was built from |

## Provenance

- **Datasheet:** [docs/bat54ws-7-f-datasheet.pdf](docs/bat54ws-7-f-datasheet.pdf), sha256 `a910241faa214991`, retrieved 2026-10-08 from LCSC
- **Specs:** each row names its source: the manufacturer datasheet (with page) or the LCSC parametric listing (retrieved 2026-10-08).
- **Distributor numbers:** looked up 2026-10-08 with adom-parts-search (Mouser, DigiKey, JLCPCB), exact part number and manufacturer only.
- **CAD:** footprint `Diode_SMD:D_SOD-323`; 3D: KiCad packages3D (tag 10.0.6), D_SOD-323.step.

## Related

- Used on the [AM/FM Receiver Molecule](https://wiki.adom.inc/adom/amfm-receiver-molecule).