# K1812L020DR

**KUU** · Resettable Fuses · 1812

K1812L020DR from KUU, in a 1812. 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 | Terminal 1 of an unpolarised fuse; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised fuse; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KUU |
| Package | 1812 |
| 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 |
|---|---|---|---|---|---|---|---|
| Minimum resistance (R min) | R min | 0.75 |  |  | Ω |  | 1 |
| Maximum resistance (R1 max) | R1 max |  |  | 5 | Ω |  | 1 |
| Maximum voltage (Vmax) |  |  |  | 30 | V |  | 1 |
| Maximum current (Imax) |  |  |  | 10 | A |  | 1 |
| Maximum operating time |  |  |  | 0.2 | Sec. |  | 1 |
| Trip current (IT) | IT |  | 0.4 |  | A |  | 1 |
| Hold current (IH) | IH |  | 0.2 |  | A |  | 1 |
| Unlabeled current column ((A) header, likely interrupt rating) |  |  | 8 |  | A |  | 1 |
| Power dissipation (Pd typ) | Pd |  | 0.8 |  | W |  | 1 |
| Hold current at ambient -40℃ | IH |  | 0.29 |  | A | Ambient temperature -40℃ | 3 |
| Hold current at ambient -20℃ | IH |  | 0.26 |  | A | Ambient temperature -20℃ | 3 |
| Hold current at ambient 0℃ | IH |  | 0.23 |  | A | Ambient temperature 0℃ | 3 |
| Hold current at ambient 25℃ | IH |  | 0.2 |  | A | Ambient temperature 25℃ | 3 |
| Hold current at ambient 40℃ | IH |  | 0.17 |  | A | Ambient temperature 40℃ | 3 |
| Hold current at ambient 50℃ | IH |  | 0.15 |  | A | Ambient temperature 50℃ | 3 |
| Hold current at ambient 60℃ | IH |  | 0.14 |  | A | Ambient temperature 60℃ | 3 |
| Hold current at ambient 70℃ | IH |  | 0.12 |  | A | Ambient temperature 70℃ | 3 |
| Hold current at ambient 85℃ | IH |  | 0.1 |  | A | Ambient temperature 85℃ | 3 |

## CAD (KiCad official)

- Symbol: `K1812L020DR`
- Footprint: `Fuse:Fuse_1812_4532Metric`
- 3D model: 1812, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal _1806_ height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `k1812l020dr-etched.step` / `k1812l020dr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `k1812l020dr.step` / `k1812l020dr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KUU datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588945271866724352) (3 pp, sha256 `b3fbc50fa7279685`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `two-terminal convention` (convention), consensus `off` (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/k1812l020dr-datasheet.pdf)