# R12.000.20

**Reomax** · Disposable Fuses · 1206

R12.000.20 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 of two interchangeable silver over-plated tin end terminals of the 1206 fast-acting fuse, rated 20A (R12.000.20), non-polarized. |
| 2 | 2 | passive | Second interchangeable silver over-plated tin end terminal of the 1206 fast-acting fuse, rated 20A (R12.000.20), non-polarized. |

## 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 amp rating (rated current 250mA~30A) |  | 4 |  |  | hours | 100% of amp rating; rated current 250mA~30A; applies to R12.000 series incl. 20A | 1 |
| Opening time at 350% of amp rating (6A~30A) |  |  |  | 5 | s | 350% of amp rating; 6A~30A; 5.0 s max | 1 |
| Opening time at 1000% of amp rating (250mA~30A) |  | 0.2 |  | 20 | ms | 1000% of amp rating; 250mA~30A | 1 |
| Insulation resistance (after opening) |  | 10000 |  |  | ohm | After opening; printed as greater than 10,000 ohms | 2 |
| Operating temperature |  | -55 |  | 125 | °C | Operating temperature range; datasheet says consult temperature rerating curve chart (curve not provided in text) | 2 |
| Reflow peak temperature (TP), Pb-free assembly | TP |  |  | 260 | °C | Pb-free reflow; printed as 260 +0/-5 °C; time within 5 °C of peak 30 s | 2 |
| Time 25°C to peak temperature (TP) |  |  |  | 8 | min | Reflow Pb-free; do not exceed 8 minutes max | 2 |
| Ramp-up rate |  |  |  | 3 | °C/s | Reflow Pb-free; 3 °C/second max | 2 |
| Ramp-down rate |  |  |  | 6 | °C/s | Reflow Pb-free; 6 °C/second max | 2 |
| Solder pot temperature |  |  |  | 260 | °C | Hand-solder parameters; solder pot temperature 260 °C max | 2 |
| Solder dwell time (solder pot) |  |  |  | 10 | s | Hand-solder parameters; solder dwell time 10 seconds max | 2 |
| Heating time (solder iron) |  | 5 |  |  | s | Hand-solder parameters; heating time 5 seconds min | 2 |
| Solder iron temperature tolerance (nominal 280 °C) |  | -5 | 280 | 5 | °C | Hand-solder parameters; printed as 280±5 °C | 2 |

## CAD (KiCad official)

- Symbol: `R12.000.20`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `r12-000-20-etched.step` / `r12-000-20-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `r12-000-20.step` / `r12-000-20.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/8603165928540684288) (4 pp, sha256 `3027701f432c044b`, retrieved 2026-10-18, 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/r12-000-20-datasheet.pdf)