# K1812L075PR

**KUU** · Resettable Fuses · 1812

K1812L075PR 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 | 0.11 |  |  | Ω |  | 1 |
| Maximum resistance after trip (R1) | R1 max |  |  | 0.45 | Ω |  | 1 |
| Maximum voltage | V max |  |  | 16 | V |  | 1 |
| Maximum current | I max |  |  | 40 | A |  | 1 |
| Maximum time to trip |  |  |  | 0.2 | s |  | 1 |
| Hold current | IH |  | 0.75 |  | A | Ambient 25℃ (IH column) | 1 |
| Trip current | IT |  | 1.5 |  | A |  | 1 |
| Power dissipation | Pd typ |  | 0.8 |  | W |  | 1 |
| Hold current vs ambient temperature |  |  | 0.16 |  | A | Ambient -40℃ | 3 |
| Hold current vs ambient temperature |  |  | 0.14 |  | A | Ambient -20℃ | 3 |
| Hold current vs ambient temperature |  |  | 0.12 |  | A | Ambient 0℃ | 3 |
| Hold current vs ambient temperature |  |  | 0.1 |  | A | Ambient 25℃ | 3 |
| Hold current vs ambient temperature |  |  | 0.08 |  | A | Ambient 40℃ | 3 |
| Hold current vs ambient temperature |  |  | 0.07 |  | A | Ambient 50℃ | 3 |
| Hold current vs ambient temperature |  |  | 0.06 |  | A | Ambient 60℃ | 3 |
| Hold current vs ambient temperature |  |  | 0.05 |  | A | Ambient 70℃ | 3 |
| Hold current vs ambient temperature |  |  | 0.03 |  | A | Ambient 85℃ | 3 |

## CAD (KiCad official)

- Symbol: `K1812L075PR`
- 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: `k1812l075pr-etched.step` / `k1812l075pr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `k1812l075pr.step` / `k1812l075pr.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/8590191852743004160) (3 pp, sha256 `b3fbc50fa7279685`, retrieved 2026-10-18, 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/k1812l075pr-datasheet.pdf)