# SF-1206SA250W-2

**BOURNS** · Disposable Fuses · 1206

SF-1206SA250W-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 | Fuse terminal 1 (non-polarized, interchangeable with terminal 2); SF-1206SA250W-2 is rated 2.5 A, 65 VDC, 50 A interrupting at 65 VDC, typical resistance 0.028 Ω. |
| 2 | 2 | passive | Fuse terminal 2 (non-polarized, interchangeable with terminal 1); slow blow, clears within 5 seconds max at 250 % of rated current, operating temperature -55 °C to +125 °C. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `SF-1206SA250W-2`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `sf-1206sa250w-2-etched.step` / `sf-1206sa250w-2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sf-1206sa250w-2.step` / `sf-1206sa250w-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/8600436355423735808) (5 pp, sha256 `3d58b2906344b168`, retrieved 2026-10-08, 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-1206sa250w-2-datasheet.pdf)