# K1210L110YR

**KUU** · Resettable Fuses · 1210

K1210L110YR 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 | One terminal of the non-polarized resettable PTC fuse (hold current IH 1.10 A, trip current IT 2.20 A, Vmax 6 V, Imax 40 A). |
| 2 | 2 | passive | Other terminal of the non-polarized resettable PTC fuse (hold current IH 1.10 A, trip current IT 2.20 A, Vmax 6 V, Imax 40 A). |

## 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 |
|---|---|---|---|---|---|---|---|
| Electrical table row 1 (label not printed in text), Min |  | 3 |  |  |  |  | 1 |
| Electrical table row 1 (label not printed in text), Max |  |  |  | 3.43 |  |  | 1 |
| Electrical table row 2 (label not printed in text), Min |  | 2.35 |  |  |  |  | 1 |
| Electrical table row 2 (label not printed in text), Max |  |  |  | 2.8 |  |  | 1 |
| Electrical table row 3 (label not printed in text), Min |  | 0.45 |  |  |  |  | 1 |
| Electrical table row 3 (label not printed in text), Max |  |  |  | 0.85 |  |  | 1 |
| Electrical table row 4 (label not printed in text), Min |  | 0.3 |  |  |  |  | 1 |
| Minimum resistance | R min | 0.05 |  |  | Ω |  | 1 |
| Maximum initial resistance | R1 max |  |  | 0.24 | Ω |  | 1 |
| Maximum voltage | V max |  |  | 6 | V |  | 1 |
| Maximum current | I max |  |  | 40 | A |  | 1 |
| Hold current | IH |  | 1.1 |  | A |  | 1 |
| Trip current | IT |  | 2.2 |  | A |  | 1 |
| Time to trip (max action time) |  |  | 0.3 |  | Sec. |  | 1 |
| Power dissipation | Pd typ |  | 0.6 |  | W |  | 1 |
| Hold current at ambient -40℃ | IH |  | 1.6 |  | A | Ambient temperature -40℃ | 2 |
| Hold current at ambient -20℃ | IH |  | 1.42 |  | A | Ambient temperature -20℃ | 2 |
| Hold current at ambient 0℃ | IH |  | 1.26 |  | A | Ambient temperature 0℃ | 2 |
| Hold current at ambient 25℃ | IH |  | 1.1 |  | A | Ambient temperature 25℃ | 2 |
| Hold current at ambient 40℃ | IH |  | 0.94 |  | A | Ambient temperature 40℃ | 2 |
| Hold current at ambient 50℃ | IH |  | 0.86 |  | A | Ambient temperature 50℃ | 2 |
| Hold current at ambient 60℃ | IH |  | 0.8 |  | A | Ambient temperature 60℃ | 2 |
| Hold current at ambient 70℃ | IH |  | 0.7 |  | A | Ambient temperature 70℃ | 2 |
| Hold current at ambient 85℃ | IH |  | 0.58 |  | A | Ambient temperature 85℃ | 2 |

## CAD (KiCad official)

- Symbol: `K1210L110YR`
- Footprint: `Fuse:Fuse_1210_3225Metric`
- 3D model: 1210 (KiCad packages3D, STEP)
- 3D model files: `k1210l110yr-etched.step` / `k1210l110yr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `k1210l110yr.step` / `k1210l110yr.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/8590191733741805568) (2 pp, sha256 `f1983841a4373ecd`, retrieved 2026-10-14, 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/k1210l110yr-datasheet.pdf)