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R12.100.4.5
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Reomax Disposable Fuses, 1206. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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R12.100.4.5
Reomax · Disposable Fuses · 1206
R12.100.4.5 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 of two interchangeable silver over-plated tin terminations of the 3.20 x 1.60 mm 1206 fuse body; the 4.5A element (marked R12.100.4.5) is rated 125Vdc max per the 'rated voltage' table, so check the table for this rating. |
| 2 | 2 | passive | The other interchangeable silver over-plated tin termination of the 1206 fuse; the element opens on overcurrent, and the fuse is 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 |
|---|---|---|---|---|---|---|---|
| Operating temperature | -55 | 125 | °C | Consult temperature rerating curve chart | 2 | ||
| Insulation resistance (after opening) | 10000 | ohm | After opening; greater than 10,000 ohms | 2 | |||
| Opening time at 100% of rated current | 4 | hours | 100% of amp rating | 1 | |||
| Opening time at 300% of rated current | 0.1 | 3 | s | 1A~5A rated current; 300% of amp rating | 1 | ||
| Opening time at 250% of rated current | 5 | s | 1A~5A rated current; 250% of amp rating | 1 | |||
| Opening time at 1000% of rated current | 0.2 | 20 | ms | 250mA~30A rated current; 1000% of amp rating | 1 | ||
| Rated current | 4.5 | A | 1 |
CAD (KiCad official)
- Symbol:
R12.100.4.5 - Footprint:
Fuse:Fuse_1206_3216Metric - 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files:
r12-100-4-5-etched.step/r12-100-4-5-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);r12-100-4-5.step/r12-100-4-5.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Reomax datasheet (4 pp, sha256
a1d9b0fb531823b9, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).
# R12.100.4.5
**Reomax** · Disposable Fuses · 1206
R12.100.4.5 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 of two interchangeable silver over-plated tin terminations of the 3.20 x 1.60 mm 1206 fuse body; the 4.5A element (marked R12.100.4.5) is rated 125Vdc max per the 'rated voltage' table, so check the table for this rating. |
| 2 | 2 | passive | The other interchangeable silver over-plated tin termination of the 1206 fuse; the element opens on overcurrent, and the fuse is 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 |
|---|---|---|---|---|---|---|---|
| Operating temperature | | -55 | | 125 | °C | Consult temperature rerating curve chart | 2 |
| Insulation resistance (after opening) | | 10000 | | | ohm | After opening; greater than 10,000 ohms | 2 |
| Opening time at 100% of rated current | | 4 | | | hours | 100% of amp rating | 1 |
| Opening time at 300% of rated current | | 0.1 | | 3 | s | 1A~5A rated current; 300% of amp rating | 1 |
| Opening time at 250% of rated current | | | | 5 | s | 1A~5A rated current; 250% of amp rating | 1 |
| Opening time at 1000% of rated current | | 0.2 | | 20 | ms | 250mA~30A rated current; 1000% of amp rating | 1 |
| Rated current | | | 4.5 | | A | | 1 |
## CAD (KiCad official)
- Symbol: `R12.100.4.5`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `r12-100-4-5-etched.step` / `r12-100-4-5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `r12-100-4-5.step` / `r12-100-4-5.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/8590196737098227712) (4 pp, sha256 `a1d9b0fb531823b9`, 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/r12-100-4-5-datasheet.pdf)