# F12T25

**TLC Electronic** · Disposable Fuses · 1206

F12T25 from TLC Electronic, 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), rated 25 A, 32 V DC, with 150 A breaking capacity at 32 Vdc. |
| 2 | 2 | passive | Fuse terminal 2 (non-polarized), rated 25 A, 32 V DC, with 1.6 mOhm typical cold resistance. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TLC Electronic |
| 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 |
|---|---|---|---|---|---|---|---|
| Time to open at 1.0In (rated current) |  | 4 |  |  | hour | at 1.0In, printed as 4 hour min. | 2 |
| Time to open at 3.5In |  |  |  | 5 | sec | at 3.5In | 2 |
| Time to open at 10.0In |  | 0.2 |  | 10 | ms | at 10.0In | 2 |
| Operating temperature |  | -55 |  | 125 | ℃ | with proper correction factor applied (temperature derating curve) | 7 |
| DC breaking capacity (interrupting rating) |  |  | 150 |  | A | @32Vdc, measured at rated voltage, time constant < 50 microseconds, battery source | 2 |
| Rated voltage DC |  |  | 32 |  | V |  | 2 |
| Rated current |  |  | 25 |  | A |  | 2 |
| Typical cold resistance |  |  | 1.6 |  | mOhms | measured at <10% of rated current, ambient 25℃ | 2 |
| Typical voltage drop |  |  | 90 |  | mV |  | 2 |
| Typical pre-arcing I2t | I2t |  | 60 |  | A2Sec | measured at 10In current | 2 |

## CAD (KiCad official)

- Symbol: `F12T25`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `f12t25-etched.step` / `f12t25-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `f12t25.step` / `f12t25.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TLC Electronic datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590207916981985280) (7 pp, sha256 `8253d02228fdd771`, retrieved 2026-10-17, 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/f12t25-datasheet.pdf)