# MF-USHT075KX-2

**BOURNS** · Resettable Fuses · 1210

MF-USHT075KX-2 from BOURNS, 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 | BOURNS |
| 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 |
|---|---|---|---|---|---|---|---|
| Minimum resistance (Rmin) | Rmin | 0.1 |  |  | Ohms | at 23 °C | 1 |
| Maximum resistance (R1max) | R1max |  |  | 1 | Ohms | at 23 °C; measured 24 hours post reflow | 1 |
| Maximum voltage (Vmax) | Vmax |  |  | 16 | V |  | 1 |
| Maximum current (Imax) | Imax |  |  | 20 | A |  | 1 |
| Maximum time to trip |  |  |  | 5 | s | at 8.0 A, 23 °C | 1 |
| Operating temperature |  | -40 |  | 125 | °C |  | 1 |
| Recommended storage temperature |  |  |  | 40 | °C | 70 % R.H. max. | 1 |
| Hold current | Ihold |  | 0.75 |  | A | at 23 °C | 1 |
| Trip current | Itrip |  | 3.75 |  | A | at 23 °C | 1 |
| Tripped power dissipation |  |  | 1 |  | W | at 23 °C | 1 |
| Hold current derating | Ihold |  | 1.09 |  | A | ambient operating temperature -40 °C | 2 |
| Hold current derating | Ihold |  | 0.98 |  | A | ambient operating temperature -20 °C | 2 |
| Hold current derating | Ihold |  | 0.87 |  | A | ambient operating temperature 0 °C | 2 |
| Hold current derating | Ihold |  | 0.75 |  | A | ambient operating temperature +23 °C | 2 |
| Hold current derating | Ihold |  | 0.66 |  | A | ambient operating temperature +40 °C | 2 |
| Hold current derating | Ihold |  | 0.61 |  | A | ambient operating temperature +50 °C | 2 |
| Hold current derating | Ihold |  | 0.56 |  | A | ambient operating temperature +60 °C | 2 |
| Hold current derating | Ihold |  | 0.5 |  | A | ambient operating temperature +70 °C | 2 |
| Hold current derating | Ihold |  | 0.42 |  | A | ambient operating temperature +85 °C | 2 |
| Hold current derating | Ihold |  | 0.2 |  | A | ambient operating temperature +125 °C | 2 |

## CAD (KiCad official)

- Symbol: `MF-USHT075KX-2`
- Footprint: `Fuse:Fuse_1210_3225Metric`
- 3D model: 1210 (KiCad packages3D, STEP)
- 3D model files: `mf-usht075kx-2-etched.step` / `mf-usht075kx-2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mf-usht075kx-2.step` / `mf-usht075kx-2.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [BOURNS datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590371110689935360) (7 pp, sha256 `58db05253ae16c67`, retrieved 2026-10-19, 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/mf-usht075kx-2-datasheet.pdf)