# SL1210250

**TECHFUSE** · Resettable Fuses · 1210

SL1210250 from TECHFUSE, 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 | TECHFUSE |
| 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 |
|---|---|---|---|---|---|---|---|
| Hold current (maximum current at which device will not trip) | IH |  |  | 2.5 | A | 25℃ still air; maximum current without tripping | 2 |
| Trip current (minimum current at which device always trips) | IT | 5 |  |  | A | 25℃ still air; minimum current that always trips | 2 |
| Maximum continuous voltage at rated current | Vmax |  |  | 6 | V | Maximum continuous voltage without damage at rated current | 2 |
| Maximum fault current at rated voltage | Imax |  |  | 50 | A | Maximum fault current without damage at rated voltage | 2 |
| Minimum resistance, initial (un-soldered) state | Rmin | 0.004 |  |  | Ω | Initial (un-soldered) state | 2 |
| Maximum resistance, initial (un-soldered) state | Rmax |  |  | 0.009 | Ω | Initial (un-soldered) state | 2 |
| Maximum resistance at 25℃ one hour after reflow | R1max |  |  | 0.025 | Ω | 25℃, measured one hour after reflow soldering 260℃ for 20 s | 2 |
| Maximum time to trip | Ttrip |  |  | 5 | s | At assigned trip current 8.0 A | 2 |
| Typical power dissipation in still air | Pdtyp |  | 1.2 |  | W | Typical power dissipated by the device in the tripped state in still air | 2 |
| Recommended storage temperature (maximum) |  |  |  | 40 | ℃ | Recommended storage conditions | 2 |
| Recommended storage relative humidity (maximum) |  |  |  | 70 | %R.H. | Recommended storage conditions | 2 |

## CAD (KiCad official)

- Symbol: `SL1210250`
- Footprint: `Fuse:Fuse_1210_3225Metric`
- 3D model: 1210 (KiCad packages3D, STEP)
- 3D model files: `sl1210250-etched.step` / `sl1210250-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sl1210250.step` / `sl1210250.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/8588916838374129664) (5 pp, sha256 `8ae482acc55ca041`, retrieved 2026-10-16, 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/sl1210250-datasheet.pdf)