# SMD1812-200C-6V

**BNstar** · Resettable Fuses · 1812

SMD1812-200C-6V from BNstar, 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 | One terminal of the non-polarized resettable PTC fuse (end termination D on the drawing), rated 2.0 A hold, 4.0 A trip, 6.0 V max and 40 A max fault current. |
| 2 | 2 | passive | Other terminal of the non-polarized resettable PTC fuse (end termination E on the drawing), rated 2.0 A hold, 4.0 A trip, 6.0 V max and 40 A max fault current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BNstar |
| 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 |
|---|---|---|---|---|---|---|---|
| Hold current | IH |  |  | 2 | A | 25℃, still air | 1 |
| Trip current | IT | 4 |  |  | A | 25℃, still air | 1 |
| Maximum continuous voltage | Vmax |  |  | 6 | V | at rated current | 1 |
| Maximum fault current | Imax |  |  | 40 | A | at rated voltage | 1 |
| Typical power dissipation | Pdtyp |  | 0.8 |  | W | when in state air environment | 1 |
| Maximum time to trip | Ttrip |  |  | 2 | S | at 8.0 A, 25℃ | 1 |
| Minimum resistance (initial, un-soldered) | Rmin | 0.02 |  |  | Ω | 25℃ | 1 |
| Maximum resistance one hour after reflow | R1max |  |  | 0.12 | Ω | 25℃, measured one hour after reflow soldering of 260℃ for 20 sec | 1 |
| Hold current derating at maximum ambient -40℃ | IH |  |  | 2.88 | A | Maximum ambient operating temperature -40℃ | 2 |
| Hold current derating at maximum ambient -20℃ | IH |  |  | 2.61 | A | Maximum ambient operating temperature -20℃ | 2 |
| Hold current derating at maximum ambient 0℃ | IH |  |  | 2.25 | A | Maximum ambient operating temperature 0℃ | 2 |
| Hold current derating at maximum ambient 25℃ | IH |  |  | 2 | A | Maximum ambient operating temperature 25℃ | 2 |
| Hold current derating at maximum ambient 40℃ | IH |  |  | 1.8 | A | Maximum ambient operating temperature 40℃ | 2 |
| Hold current derating at maximum ambient 50℃ | IH |  |  | 1.66 | A | Maximum ambient operating temperature 50℃ | 2 |
| Hold current derating at maximum ambient 60℃ | IH |  |  | 1.45 | A | Maximum ambient operating temperature 60℃ | 2 |
| Hold current derating at maximum ambient 70℃ | IH |  |  | 1.09 | A | Maximum ambient operating temperature 70℃ | 2 |
| Hold current derating at maximum ambient 85℃ | IH |  |  | 0.8 | A | Maximum ambient operating temperature 85℃ | 2 |
| Recommended storage temperature |  |  |  | 40 | ℃ | Recommended storage conditions | 2 |
| Recommended storage relative humidity |  |  |  | 70 | %R.H. | Recommended storage conditions | 2 |

## CAD (KiCad official)

- Symbol: `SMD1812-200C-6V`
- 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: `smd1812-200c-6v-etched.step` / `smd1812-200c-6v-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smd1812-200c-6v.step` / `smd1812-200c-6v.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BNstar datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603382457085407232) (3 pp, sha256 `83669ae6fedb7eee`, retrieved 2026-10-17, 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/smd1812-200c-6v-datasheet.pdf)