# FTR1812-014

**FTR** · Resettable Fuses · 1812

FTR1812-014 from FTR, 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 | FTR |
| 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 |
|---|---|---|---|---|---|---|---|
| Trip current (minimum) | Itrip | 0.34 |  |  | A | 23℃ still air | 1 |
| Minimum resistance, initial (un-soldered) state | Rmin | 1.5 |  |  | Ω | initial (un-soldered) state | 1 |
| Maximum voltage device can withstand without damage | Vmax |  |  | 60 | V | without damage at rated current (Imax) | 1 |
| Maximum fault current device can withstand without damage | Imax |  |  | 10 | A | without damage at rated voltage (Vmax) | 1 |
| Maximum resistance after tripping or reflow | R1max |  |  | 6 | Ω | 23℃, measured one hour after tripping or reflow soldering of 260℃ for 20 sec | 1 |
| Maximum time to trip |  |  |  | 0.15 | s | at 1.50 A current | 1 |
| Operating / storage temperature |  | -40 |  | 85 | ℃ | Operating / storage temperature range | 5 |
| Maximum device surface temperature in tripped state |  |  |  | 125 | ℃ | tripped state | 5 |
| Peak temperature (reflow profile) | TP |  |  | 260 | ℃ | Pb-free reflow profile, peak temperature | 4 |
| Passive aging resistance change |  | -50 |  | 50 | % | +85℃, 1000 hours; typical resistance change | 5 |
| Humidity aging resistance change |  | -50 |  | 50 | % | +85℃, 85%RH, 1000 hours; typical resistance change | 5 |
| Hold current | Ihold |  | 0.14 |  | A | maximum current device will pass without tripping in 23℃ still air | 1 |
| Typical power dissipated in tripped state | Pd |  | 0.8 |  | W | typical, tripped state at 23℃ still air | 1 |
| Thermal shock resistance change |  |  | -50 |  | % | MIL-STD-202 Method 107G, +85℃/-40℃ 20 times; typical resistance change | 5 |

## CAD (KiCad official)

- Symbol: `FTR1812-014`
- 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: `ftr1812-014-etched.step` / `ftr1812-014-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ftr1812-014.step` / `ftr1812-014.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FTR datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590169605844344832) (6 pp, sha256 `901196765d349b7b`, 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/ftr1812-014-datasheet.pdf)