# SF-1206F200-2

**BOURNS** · Disposable Fuses · 1206

SF-1206F200-2 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 fuse terminal (Sn-plated end cap) of the 2.00 A fast-acting fuse, rated DC 63 V with 50 A breaking capacity; interchangeable with the other terminal. |
| 2 | 2 | passive | Other fuse terminal (Sn-plated end cap) of the 2.00 A fast-acting fuse, opens within 1 min at 200 % of rated current; typical resistance 40.5 mΩ. |

## Key specifications

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

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Rated Current |  |  | 2 |  | A |  | 1 |
| Resistance (Typ.) |  |  | 40.5 |  | mΩ | measured with less than 10 % of rated current | 1 |
| Resistance tolerance |  | -25 |  | 25 | % | resistance measured with less than 10 % of rated current | 1 |
| Rated Voltage |  |  |  | 63 | V | DC | 1 |
| Breaking Capacity |  |  |  | 50 | A |  | 1 |
| Typical I2t | I2t |  | 0.181 |  | A2s | measured at 10x rated current | 1 |
| Fusing Time |  |  |  | 1 | min | open within 1 min at 200 % rated current | 1 |
| Operating Temperature |  | -20 |  | 105 | °C |  | 1 |
| Storage Temperature |  | 5 |  | 35 | °C | storage conditions | 1 |
| Storage Humidity |  | 40 |  | 75 | % | storage conditions | 1 |
| Residual Resistance |  | 10 |  |  | k ohms | measure DC resistance after fusing | 1 |
| Temperature Rise |  |  |  | 75 | °C | 100 % of its rated current, surface temperature | 1 |
| Resistance change after Resistance to Solder Heat |  | -20 |  | 20 | % | 260 °C ±5 °C, 10 seconds ±1 second | 1 |
| Resistance change after Resistance to Dry Heat |  | -20 |  | 20 | % | 105 °C ±5 °C, 1000 hours | 1 |
| Resistance change after Thermal Shock (DR) | DR |  |  | 10 | % | -20 °C / +25 °C / +125 °C / +25 °C, 10 cycles | 1 |

## CAD (KiCad official)

- Symbol: `SF-1206F200-2`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `sf-1206f200-2-etched.step` / `sf-1206f200-2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sf-1206f200-2.step` / `sf-1206f200-2.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/8588917759454924801) (5 pp, sha256 `8a477fdc7d08bcea`, retrieved 2026-10-19, 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-1206f200-2-datasheet.pdf)