# SMD1206-200C-12V

**BNstar** · Resettable Fuses · 1206

SMD1206-200C-12V from BNstar, 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 terminal of the non-polarized resettable PTC fuse, in series with the protected line; rated 2.0 A hold, 3.5 A trip at 25℃, 12.0 V max, 40 A max fault current. |
| 2 | 2 | passive | Other terminal of the non-polarized resettable PTC fuse, in series with the protected line; rated 2.0 A hold, 3.5 A trip at 25℃, 12.0 V max, 40 A max fault current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BNstar |
| 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 |
|---|---|---|---|---|---|---|---|
| Trip current (always trips at or above) | IT | 3.5 |  |  | A | 25℃ still air | 1 |
| Minimum resistance (un-soldered) | Rmin | 0.015 |  |  | Ω | 25℃ | 1 |
| Maximum resistance at 25℃ after reflow | R1max |  |  | 0.08 | Ω | 25℃, measured one hour after reflow soldering of 260℃ for 20 sec | 1 |
| Maximum time to trip | Ttrip |  |  | 1.5 | S | at assigned current 8.0 A | 1 |
| Hold current (maximum non-trip current) | IH |  |  | 2 | A | 25℃ still air | 1 |
| Maximum continuous voltage (rated voltage) | Vmax |  |  | 12 | V | at rated current | 1 |
| Maximum fault current withstand | Imax |  |  | 40 | A | at rated voltage | 1 |
| Typical power dissipation | Pdtyp |  | 0.8 |  | W |  | 1 |
| Hold current at ambient -40 ℃ |  |  | 2.88 |  | A | ambient temperature -40 ℃ | 2 |
| Hold current at ambient -20 ℃ |  |  | 2.63 |  | A | ambient temperature -20 ℃ | 2 |
| Hold current at ambient 0 ℃ |  |  | 2.34 |  | A | ambient temperature 0 ℃ | 2 |
| Hold current at ambient 25 ℃ |  |  | 2 |  | A | ambient temperature 25 ℃ | 2 |
| Hold current at ambient 40 ℃ |  |  | 1.74 |  | A | ambient temperature 40 ℃ | 2 |
| Hold current at ambient 50 ℃ |  |  | 1.58 |  | A | ambient temperature 50 ℃ | 2 |
| Hold current at ambient 60 ℃ |  |  | 1.42 |  | A | ambient temperature 60 ℃ | 2 |
| Hold current at ambient 70 ℃ |  |  | 1.17 |  | A | ambient temperature 70 ℃ | 2 |
| Hold current at ambient 85 ℃ |  |  | 0.93 |  | A | ambient temperature 85 ℃ | 2 |
| Recommended storage temperature |  |  |  | 40 | °C | recommended storage conditions | 2 |
| Recommended storage relative humidity |  |  |  | 70 | % R.H. | recommended storage conditions | 2 |

## CAD (KiCad official)

- Symbol: `SMD1206-200C-12V`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `smd1206-200c-12v-etched.step` / `smd1206-200c-12v-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smd1206-200c-12v.step` / `smd1206-200c-12v.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/8589784802590023680) (3 pp, sha256 `9b08c5448724f2c0`, 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/smd1206-200c-12v-datasheet.pdf)