# K1210L075YR

**KUU** · Resettable Fuses · 1210

K1210L075YR from KUU, in a 1210. 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 | 1210 |
| 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 |
|---|---|---|---|---|---|---|---|
| Max. voltage (V max) | V max |  |  | 6 | V |  | 1 |
| Max. current (I max) | I max |  |  | 40 | A |  | 1 |
| Max. time to trip |  |  |  | 0.1 | Sec. |  | 1 |
| Minimum resistance (R min) | R min | 0.07 |  |  | Ω |  | 1 |
| Maximum resistance (R1 max) | R1 max |  |  | 0.45 | Ω |  | 1 |
| Hold current (IH) | IH |  | 0.75 |  | A |  | 1 |
| Trip current (IT) | IT |  | 1.5 |  | A |  | 1 |
| Power dissipation (Pd typ) | Pd |  | 0.6 |  | W |  | 1 |
| Hold current vs ambient temperature |  |  | 1.1 |  | A | Ambient temperature -40℃ | 2 |
| Hold current vs ambient temperature |  |  | 0.97 |  | A | Ambient temperature -20℃ | 2 |
| Hold current vs ambient temperature |  |  | 0.86 |  | A | Ambient temperature 0℃ | 2 |
| Hold current vs ambient temperature |  |  | 0.75 |  | A | Ambient temperature 25℃ | 2 |
| Hold current vs ambient temperature |  |  | 0.64 |  | A | Ambient temperature 40℃ | 2 |
| Hold current vs ambient temperature |  |  | 0.58 |  | A | Ambient temperature 50℃ | 2 |
| Hold current vs ambient temperature |  |  | 0.55 |  | A | Ambient temperature 60℃ | 2 |
| Hold current vs ambient temperature |  |  | 0.47 |  | A | Ambient temperature 70℃ | 2 |
| Hold current vs ambient temperature |  |  | 0.39 |  | A | Ambient temperature 85℃ | 2 |

## CAD (KiCad official)

- Symbol: `K1210L075YR`
- Footprint: `Fuse:Fuse_1210_3225Metric`
- 3D model: 1210 (KiCad packages3D, STEP)
- 3D model files: `k1210l075yr-etched.step` / `k1210l075yr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `k1210l075yr.step` / `k1210l075yr.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/8590191733528571904) (2 pp, sha256 `f1983841a4373ecd`, retrieved 2026-10-17, 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/k1210l075yr-datasheet.pdf)