# SF-1206S250-2

**BOURNS** · Disposable Fuses · 1206

SF-1206S250-2 from BOURNS, in a 1206. 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 | 1 | passive | One end terminal of the SF-1206S250 slow blow fuse (2.50 A rated, DC 32 V, 50 A breaking capacity); the fuse is non-polarized and the datasheet gives no pin numbering, so the terminals are interchangeable. |
| 2 | 2 | passive | Other end terminal of the SF-1206S250 slow blow fuse (2.50 A rated, DC 32 V, 50 A breaking capacity); non-polarized and interchangeable with the other terminal, with a typical resistance of 33 mΩ. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BOURNS |
| Package | 1206 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `SF-1206S250-2`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `sf-1206s250-2-etched.step` / `sf-1206s250-2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sf-1206s250-2.step` / `sf-1206s250-2.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BOURNS datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588924535898431488) (5 pp, sha256 `20cc983642061c52`, 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/sf-1206s250-2-datasheet.pdf)