# UF5404

**LGE** · Diodes - General Purpose · DO-27

UF5404 from LGE, in a DO-27. 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 axial lead on the color-band end of the DO-27 body; UF5404 has 400 V VRRM/VDC and 3.0 A average forward current. |
| 2 | A | passive | Anode, the axial lead at the end opposite the color band; datasheet gives 1.0 in (25.4 mm) minimum lead length and 1.0 V max forward voltage at 3.0 A for UF5404. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LGE |
| Package | DO-27 |
| Category | Diodes |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `UF5404`
- Footprint: `Diode_THT:D_DO-27_P15.24mm_Horizontal`
- 3D model: DO-27 (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [LGE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590208038645891072) (2 pp, sha256 `02f0ebdd87f014db`, retrieved 2026-10-13, 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/uf5404-datasheet.pdf)