# BSMD1812L-800-12V

**BHFUSE** · Resettable Fuses · 1812

BSMD1812L-800-12V from BHFUSE, 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 | Non-polarized PTC terminal on one end of the 1812 (4.5x3.2 mm) body, rated 12 Vdc max, 50 A max fault current, 8.00 A hold and 16.0 A trip at 25°C; recommended pad 1.78±0.1 mm wide by 3.15±0.1 mm. |
| 2 | 2 | passive | Non-polarized PTC terminal on the opposite end of the body, interchangeable with the other terminal, with a recommended 3.45±0.1 mm pad spacing. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BHFUSE |
| Package | 1812 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `BSMD1812L-800-12V`
- Footprint: `Fuse:Fuse_1812_4532Metric`
- 3D model: 1812 (KiCad packages3D, STEP)
- 3D model files: `bsmd1812l-800-12v-etched.step` / `bsmd1812l-800-12v-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bsmd1812l-800-12v.step` / `bsmd1812l-800-12v.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BHFUSE datasheet](docs/bsmd1812l-800-12v-datasheet.pdf) (8 pp, sha256 `3ba50dda5b2b7c6a`, retrieved 2026-10-09, 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/bsmd1812l-800-12v-datasheet.pdf)