# UF5407

**LGE** · Fast Recovery / High Efficiency Diodes · DO-27

UF5407 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, marked by the color band on the package; the UF5407 is rated 1000 V VRRM and 3.0 A average forward current. |
| 2 | A | passive | Anode, the end opposite the color band; the UF5407 has a maximum forward voltage of 1.7 V at 3.0 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LGE |
| Package | DO-27 |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum Repetitive Peak Reverse Voltage | VRRM |  |  | 800 | V |  | 1 |
| Maximum RMS Voltage | VRMS |  |  | 560 | V |  | 1 |
| Maximum DC Blocking Voltage | VDC |  |  | 800 | V |  | 1 |
| Maximum Average Forward Rectified Current | I(AV) |  |  | 3 | A | 0.375 (9.5mm) lead length at TA=50 C | 1 |
| Peak Forward Surge Current | IFSM |  |  | 150 | A | 8.3ms single half sine-wave superimposed on rated load (JEDEC Method) | 1 |
| Maximum DC Reverse Current | IR |  |  | 5 | µA | at rated DC blocking voltage TA=25 C | 1 |
| Operating and Storage Temperature Range | TJ,TSTG | -65 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `UF5407`
- 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](docs/uf5407-datasheet.pdf) (2 pp, sha256 `8e5399eefab2b9ac`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-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/uf5407-datasheet.pdf)