# K1206L075

**KUU** · Resettable Fuses · 1206

K1206L075 from KUU, in a 1206. 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 | Non-polarized PPTC terminal pad (Tin-plated Nickel-Copper) in series with the protected line; rated 16 Vdc max, 0.75 A hold, 1.50 A trip, 35 A max fault current. |
| 2 | 2 | passive | Second non-polarized PPTC terminal pad, interchangeable with the other terminal; 0.090 ohm min to 0.500 ohm max (R1max) resistance before tripping at 25°C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KUU |
| Package | 1206 |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum operating voltage | Vmax |  |  | 16 | V dc | at rated current (Imax) | 1 |
| Maximum fault current | Imax |  |  | 35 | A | at rated voltage (Vmax) | 1 |
| Hold current | Ihold |  |  | 0.75 | A | 25°C still air; maximum current device will not trip | 1 |
| Trip current | Itrip | 1.5 |  |  | A | 25°C still air; minimum current at which device always trips | 1 |
| Power dissipation in tripped state | Pd |  | 0.6 |  | W | tripped state, 25°C still air, at rated voltage | 1 |
| Minimum resistance prior to tripping | Ri min | 0.09 |  |  | Ω | 25°C | 1 |
| Maximum resistance one hour post reflow | R1max |  |  | 0.5 | Ω | measured one hour post reflow, 25°C | 1 |
| Passive aging resistance change |  | -5 |  | 5 | % | +85°C, 1000 hrs; typical | 1 |
| Humidity aging resistance change |  | -5 |  | 5 | % | +85°C, 85% R.H., 168 hours; typical | 1 |
| Thermal shock resistance change |  | -33 |  | 33 | % | +85°C to -40°C, 20 times; typical | 1 |
| Ambient operating temperature |  | -40 |  | 85 | °C | ambient operating conditions | 1 |
| Maximum surface temperature in tripped state |  |  |  | 125 | °C | device in tripped state | 1 |
| Storage temperature |  | 0 |  | 35 | °C | storage condition | 2 |
| Storage relative humidity |  | 30 |  | 60 | %RH | storage condition | 2 |
| Peak reflow temperature | Tp |  |  | 260 | °C | Pb-free reflow profile; exceeding recommended profile may void performance | 2 |
| Average ramp-up rate (Ts max to Tp) |  |  |  | 3 | °C/second | Pb-free reflow profile | 2 |
| Ramp-down rate |  |  |  | 6 | °C/second | Pb-free reflow profile | 2 |
| Time from 25°C to peak temperature |  |  |  | 8 | minutes | Pb-free reflow profile | 2 |

## CAD (KiCad official)

- Symbol: `K1206L075`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `k1206l075-etched.step` / `k1206l075-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `k1206l075.step` / `k1206l075.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/8590191733154603008) (3 pp, sha256 `e4322a87beb1bfb1`, 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/k1206l075-datasheet.pdf)