# mSMD260

**TECHFUSE** · Resettable Fuses · 1812

mSMD260 from TECHFUSE, in a 1812. 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 | TECHFUSE |
| Package | 1812 |
| 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 (rated voltage) | Vmax |  |  | 8 | Vdc | Without damage at rated current (Imax) | 1 |
| Maximum fault current | Imax |  |  | 100 | A | Without damage at rated voltage (Vmax) | 1 |
| Hold current (maximum current that does not trip) | Ihold |  |  | 2.6 | A | 25°C still air | 1 |
| Trip current (minimum current that always trips) | Itrip | 5 |  |  | A | 25°C still air | 1 |
| Minimum device resistance prior to tripping | Rimin | 0.015 |  |  | Ω | 25°C | 1 |
| Maximum device resistance one hour post reflow | R1max |  |  | 0.05 | Ω | Measured one hour post reflow | 1 |
| Ambient operating temperature |  | -40 |  | 85 | °C | Ambient operating conditions | 1 |
| Maximum surface temperature in tripped state |  |  |  | 125 | °C | Device in the tripped state | 1 |
| Storage temperature |  |  |  | 40 | °C | Storage conditions: 40°C max, 70% R.H. | 3 |
| Power dissipation in tripped state | Pd |  | 0.8 |  | W | Tripped state, 25°C still air, at rated voltage | 1 |
| Typical time to trip at current (column 'Typ. Current 8.0 A') |  |  | 2.5 |  | Sec | Typical current 8.0 A per table header | 1 |

## CAD (KiCad official)

- Symbol: `mSMD260`
- Footprint: `Fuse:Fuse_1812_4532Metric`
- 3D model: 1812, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal _1806_ height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `msmd260-etched.step` / `msmd260-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `msmd260.step` / `msmd260.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECHFUSE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175310685474816) (3 pp, sha256 `67b891cab3436150`, retrieved 2026-10-15, 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/msmd260-datasheet.pdf)