# SMF58A

**LGE** · ESD And Surge Protection (TVS/ESD) · SOD-123

SMF58A from LGE, in a SOD-123. 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 of the unidirectional TVS, marked by the color band on the package; connect to the protected line, with VRWM 58 V and breakdown 64.4 to 71.2 V at 1 mA. |
| 2 | A | passive | Anode of the unidirectional TVS (end opposite the color band); connect to ground or the return, with maximum clamping voltage 93.6 V at IPP 2.14 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LGE |
| Package | SOD-123 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `SMF58A`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `smf58a-etched.step` / `smf58a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smf58a.step` / `smf58a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LGE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586189805009321984) (3 pp, sha256 `a2ee85aa52e0a4f6`, retrieved 2026-10-09, 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/smf58a-datasheet.pdf)