# R12.000.3.5

**Reomax** · Disposable Fuses · 1206

R12.000.3.5 from Reomax, in a 1206. 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 | One tin-plated end terminal of the non-polarized 1206 fast-acting fuse (3.5A rated current for R12.000.3.5), which opens on overcurrent; interchangeable with the other terminal. |
| 2 | 2 | passive | Second tin-plated end terminal of the non-polarized 1206 fast-acting fuse (3.5A rated current for R12.000.3.5), which opens on overcurrent; interchangeable with the other terminal. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Reomax |
| Package | 1206 |
| 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 |
|---|---|---|---|---|---|---|---|
| Opening time at 100% of rated current |  | 4 |  |  | hours | 100% of amp rating | 1 |
| Insulation resistance after opening |  | 10000 |  |  | ohms | After opening | 2 |
| Opening time at 250% of rated current |  |  |  | 5 | s | 1A~5A band, 250% of amp rating | 1 |
| Opening time at 300% of rated current |  | 0.1 |  | 3 | s | 1A~5A band, 300% of amp rating | 1 |
| Opening time at 1000% of rated current |  | 0.2 |  | 20 | ms | 250mA~30A band, 1000% of amp rating | 1 |
| Rated current |  |  | 3.5 |  | A |  | 1 |
| Operating temperature |  | -55 |  | 125 | °C | Consult temperature rerating curve chart | 2 |
| Peak temperature, Pb-free reflow | TP |  |  | 260 | °C | Pb-free reflow; printed as 260+0/-5 °C | 2 |
| Solder pot temperature |  |  |  | 260 | °C | Hand-solder parameters | 2 |
| Solder pot dwell time |  |  |  | 10 | s | Hand-solder parameters | 2 |
| Solder iron heating time |  | 5 |  |  | s | Hand-solder parameters | 2 |
| Solder iron temperature |  |  | 280 |  | °C | Hand-solder parameters; printed as 280±5 °C | 2 |
| Preheat minimum temperature | Ts(min) | 150 |  |  | °C | Pb-free reflow preheat | 2 |
| Preheat maximum temperature | Ts(max) |  |  | 200 | °C | Pb-free reflow preheat | 2 |
| Preheat time | ts | 60 |  | 120 | s | Pb-free reflow preheat | 2 |
| Time above liquidus | tL | 60 |  | 150 | s | Pb-free reflow, liquidus 217 °C | 2 |
| Time from 25°C to peak temperature |  |  |  | 8 | minutes | Pb-free reflow | 2 |

## CAD (KiCad official)

- Symbol: `R12.000.3.5`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `r12-000-3-5-etched.step` / `r12-000-3-5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `r12-000-3-5.step` / `r12-000-3-5.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Reomax datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590196487780409344) (4 pp, sha256 `13dab07a60dbbf12`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (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/r12-000-3-5-datasheet.pdf)