# SMF3.3CA

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

SMF3.3CA from BORN, 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 | A1 | passive | Bidirectional TVS terminal 1, connects to the protected data/power line, with VRWM 3.3V max, VBR 4.2-5.8V at 1mA and 440W peak pulse power (8/20us). |
| 2 | A2 | passive | Bidirectional TVS terminal 2, interchangeable with terminal 1 and normally connected to ground, with VRWM 3.3V max and 40A peak pulse current (8/20us). |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `SMF3.3CA`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `smf3-3ca-etched.step` / `smf3-3ca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smf3-3ca.step` / `smf3-3ca.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BORN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590903625218936832) (5 pp, sha256 `e39c01631601d623`, 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/smf3-3ca-datasheet.pdf)