# UF3M

**DIYI Elec Tech** · Fast Recovery / High Efficiency Diodes · SMB

UF3M from DIYI Elec Tech, in a SMB. 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 end marked by the color band; UF3M is rated for 1000 V maximum recurrent peak reverse voltage and 3.0 A average rectified output current. |
| 2 | A | passive | Anode terminal; forward voltage is 1.7 V maximum at IF=3.0A for UF3M and the operating and storage temperature range is -55 to +175 °C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | DIYI Elec Tech |
| Package | SMB |
| Category | Diodes |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `UF3M`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `uf3m-etched.step` / `uf3m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uf3m.step` / `uf3m.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [DIYI Elec Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590903284800565248) (3 pp, sha256 `3f40c7a0981e2c3e`, 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/uf3m-datasheet.pdf)