# SL1210450

**TECHFUSE** · Resettable Fuses · 1210

SL1210450 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 |
|---|---|---|---|---|---|---|---|
| Minimum trip current | IT | 9 |  |  | A | 25℃ still air | 2 |
| Minimum resistance (initial, un-soldered) | Rmin | 0.001 |  |  | Ω | initial (un-soldered) state | 2 |
| Maximum continuous voltage | Vmax |  |  | 6 | V | at rated current | 2 |
| Maximum fault current | Imax |  |  | 50 | A | at rated voltage | 2 |
| Maximum time to trip | Ttrip |  |  | 16 | s | at assigned current; reflow 260℃ 20 s | 2 |
| Maximum resistance (initial, un-soldered) | Rmax |  |  | 0.006 | Ω | initial (un-soldered) state | 2 |
| Maximum resistance after reflow | R1max |  |  | 0.014 | Ω | 25℃, measured 1 h after reflow 260℃ 20 s | 2 |
| Recommended storage temperature |  |  |  | 40 | ℃ | Recommended storage conditions | 2 |
| Recommended storage relative humidity |  |  |  | 70 | % R.H. | Recommended storage conditions | 2 |
| Resistance change after vibration |  | -5 |  | 5 | % | MIL-STD-883C Method 2007.1 Condition A | 2 |
| Typical power dissipation | Pdtyp |  | 1.5 |  | W | in still air state | 2 |
| Hold current | IH |  | 4.5 |  | A | 25℃ still air | 2 |

## CAD (KiCad official)

- Symbol: `SL1210450`
- Footprint: `Fuse:Fuse_1210_3225Metric`
- 3D model: 1210 (KiCad packages3D, STEP)
- 3D model files: `sl1210450-etched.step` / `sl1210450-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sl1210450.step` / `sl1210450.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/8588916808951222272) (5 pp, sha256 `8ae482acc55ca041`, retrieved 2026-10-20, 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/sl1210450-datasheet.pdf)