# K1812L260

**KUU** · Resettable Fuses · 1812

K1812L260 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 | First terminal of the non-polarized PTC resettable fuse (2.60 A hold, 5.20 A trip at 25°C, 16 V max, 100 A max fault current), soldered to one 1.5 mm pad. |
| 2 | 2 | passive | Second terminal of the non-polarized PTC resettable fuse (2.60 A hold, 5.20 A trip at 25°C, 16 V max, 100 A max fault current), soldered to the other 1.5 mm pad. |

## 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 |
|---|---|---|---|---|---|---|---|
| Holding current | IH |  |  | 2.6 | A | 25℃ still air | 1 |
| Tripping current | IT | 5.2 |  |  | A | 25℃ still air | 1 |
| Maximum voltage device can withstand | Vmax |  |  | 16 | V | at rated current | 1 |
| Maximum fault current device can withstand | Imax |  |  | 100 | A | at rated voltage | 1 |
| Maximum time to trip | Ttrip |  |  | 5 | s | at 8.0 A | 1 |
| Minimum resistance prior to trip | R min | 0.015 |  |  | Ω | 25℃ | 1 |
| Maximum resistance one hour post reflow | R1max |  |  | 0.08 | Ω | measured one hour post reflow at 25℃ | 1 |
| Rated working power | Pd typ |  | 1.2 |  | W |  | 1 |

## CAD (KiCad official)

- Symbol: `K1812L260`
- 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: `k1812l260-etched.step` / `k1812l260-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `k1812l260.step` / `k1812l260.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/8590191852646264832) (1 pp, sha256 `010e94dd84eaa71f`, retrieved 2026-10-19, 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/k1812l260-datasheet.pdf)