# K1210L200

**KUU** · Resettable Fuses · 1210

K1210L200 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 | First terminal of the two-terminal PPTC resettable fuse, rated IH 2.00 A hold and IT 4.00 A trip at 25℃, Vmax 8 V, Imax 40 A. |
| 2 | 2 | passive | Second terminal of the two-terminal PPTC resettable fuse, interchangeable with the first (non-polarized), rated IH 2.00 A hold and IT 4.00 A trip at 25℃, Vmax 8 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 |
|---|---|---|---|---|---|---|---|
| Holding current | IH |  |  | 2 | A | Maximum current at which device will not trip, 25℃ still air | 1 |
| Tripping current | IT | 4 |  |  | A | Minimum current at which device will trip, 25℃ still air | 1 |
| Minimum resistance prior to trip | R min | 0.02 |  |  | Ω | 25℃ | 1 |
| Maximum resistance one hour post reflow | R1max |  |  | 0.09 | Ω | Measured one hour post reflow at 25℃ | 1 |
| Maximum voltage withstand | Vmax |  |  | 8 | V | Without damage at rated current | 1 |
| Maximum fault current withstand | Imax |  |  | 40 | A | Without damage at rated voltage | 1 |
| Maximum time to trip | Ttrip |  |  | 1 | s | At 8.00 A | 1 |
| Hold current derating | IH |  |  | 3.2 | A | Maximum ambient operating temperature -40℃ | 1 |
| Hold current derating | IH |  |  | 2.8 | A | Maximum ambient operating temperature -20℃ | 1 |
| Hold current derating | IH |  |  | 2.4 | A | Maximum ambient operating temperature 0℃ | 1 |
| Hold current derating | IH |  |  | 2 | A | Maximum ambient operating temperature 25℃ | 1 |
| Hold current derating | IH |  |  | 1.8 | A | Maximum ambient operating temperature 40℃ | 1 |
| Hold current derating | IH |  |  | 1.6 | A | Maximum ambient operating temperature 50℃ | 1 |
| Hold current derating | IH |  |  | 1.4 | A | Maximum ambient operating temperature 60℃ | 1 |
| Hold current derating | IH |  |  | 1.2 | A | Maximum ambient operating temperature 70℃ | 1 |
| Hold current derating | IH |  |  | 1 | A | Maximum ambient operating temperature 85℃ | 1 |
| Trip current derating | IT | 6.4 |  |  | A | Maximum ambient operating temperature -40℃ | 1 |
| Trip current derating | IT | 5.6 |  |  | A | Maximum ambient operating temperature -20℃ | 1 |
| Trip current derating | IT | 4.8 |  |  | A | Maximum ambient operating temperature 0℃ | 1 |
| Trip current derating | IT | 4 |  |  | A | Maximum ambient operating temperature 25℃ | 1 |
| Trip current derating | IT | 3.6 |  |  | A | Maximum ambient operating temperature 40℃ | 1 |
| Trip current derating | IT | 3.2 |  |  | A | Maximum ambient operating temperature 50℃ | 1 |
| Trip current derating | IT | 2.8 |  |  | A | Maximum ambient operating temperature 60℃ | 1 |
| Trip current derating | IT | 2.4 |  |  | A | Maximum ambient operating temperature 70℃ | 1 |
| Trip current derating | IT | 2 |  |  | A | Maximum ambient operating temperature 85℃ | 1 |
| Rated working power | Pd |  | 0.7 |  | W | Rated working power (typ) | 1 |

## CAD (KiCad official)

- Symbol: `K1210L200`
- Footprint: `Fuse:Fuse_1210_3225Metric`
- 3D model: 1210 (KiCad packages3D, STEP)
- 3D model files: `k1210l200-etched.step` / `k1210l200-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `k1210l200.step` / `k1210l200.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/8590191735088582656) (1 pp, sha256 `b510de6f0dddc1fd`, retrieved 2026-10-18, 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/k1210l200-datasheet.pdf)