# F12F20

**TLC Electronic** · Disposable Fuses · 1206

F12F20 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 (end cap, 0.50 mm wide on a 3.20±0.20 x 1.60±0.20 mm body); 20A rated current, 32V DC rated voltage, 150A@32Vdc breaking capacity. |
| 2 | 2 | passive | Fuse terminal 2 (end cap, 0.50 mm wide on a 3.20±0.20 x 1.60±0.20 mm body); interchangeable with terminal 1, typical cold resistance 1.8 mOhms. |

## 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 time at 1.0In (rated current 20A), minimum |  | 4 |  |  | hour | Rated current 20A; at 1.0In | 2 |
| Operating time at 3.5In (rated current 20A), maximum |  |  |  | 5 | sec | Rated current 20A; at 3.5In | 2 |
| Breaking capacity (DC interrupting rating) |  |  |  | 150 | A | At 32Vdc; measured at rated voltage, time constant less than 50 microseconds, battery source | 2 |
| DC rated voltage |  |  |  | 32 | V | DC rated voltage (printed as 32V) | 2 |
| Operating temperature range |  | -55 |  | 125 | ℃ | Operating temperature, with proper correction factor applied | 5 |
| Rated current |  |  | 20 |  | A |  | 2 |
| DC cold resistance |  |  | 1.8 |  | mOhms | Measured at <10% of rated current in ambient temperature of 25℃ | 2 |
| Voltage drop |  |  | 60 |  | mV |  | 2 |
| Typical pre-arcing I2t | I2t |  | 47.17 |  | A2Sec | Measured at 10In current | 2 |

## CAD (KiCad official)

- Symbol: `F12F20`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `f12f20-etched.step` / `f12f20-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `f12f20.step` / `f12f20.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/8590207940402438144) (5 pp, sha256 `3d15a6d1ffbe3fae`, retrieved 2026-10-18, 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/f12f20-datasheet.pdf)