# F12F4.5

**TLC Electronic** · Disposable Fuses · 1206

F12F4.5 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 | One end-cap terminal of the 1206 (3.20x1.60 mm) fuse, rated 4.5A and 32V DC with 150A breaking capacity at 32Vdc and about 30 mOhm typical cold resistance. |
| 2 | 2 | passive | Other end-cap terminal of the non-polarized fuse (0.50 mm terminal length), interchangeable with the first terminal, with 164 mV typical voltage drop at rated current. |

## 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 |
|---|---|---|---|---|---|---|---|
| Operating temperature |  | -55 |  | 125 | ℃ | With proper correction factor applied (temperature derating curve not given numerically) | 5 |
| Rated current |  |  | 4.5 |  | A |  | 2 |
| Rated voltage (DC) |  |  | 32 |  | V |  | 2 |
| Breaking capacity |  |  | 150 |  | A | @32Vdc; measured at rated voltage, time constant of less than 50 microseconds, battery source | 2 |
| DC cold resistance (typical) |  |  | 30 |  | mOhms | Measured at <10% of rated current in ambient temperature of 25℃ | 2 |
| Typical voltage drop |  |  | 164 |  | mV |  | 2 |
| Typical pre-arcing I2t |  |  | 2.62 |  | A2Sec | Measured at 10In current | 2 |

## CAD (KiCad official)

- Symbol: `F12F4.5`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `f12f4-5-etched.step` / `f12f4-5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `f12f4-5.step` / `f12f4-5.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/8590207889680990208) (5 pp, sha256 `a95dd977f8f33471`, 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/f12f4-5-datasheet.pdf)