# BSMD0402L-004

**BHFUSE** · Resettable Fuses · 0402

BSMD0402L-004 from BHFUSE, in a 0402. 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 end terminal of the non-polarized PTC device (hold current 0.04 A, trip current 0.16 A, Vmax 12.0 Vdc, Imax 40 A); recommended pad is 0.60±0.1 mm by 0.70±0.1 mm. |
| 2 | 2 | passive | Other end terminal of the non-polarized PTC device (hold current 0.04 A, trip current 0.16 A, Vmax 12.0 Vdc, Imax 40 A); pad gap is 0.40±0.1 mm. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BHFUSE |
| Package | 0402 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `BSMD0402L-004`
- Footprint: `Fuse:Fuse_0402_1005Metric`
- 3D model: 0402 (KiCad packages3D, STEP)
- 3D model files: `bsmd0402l-004-etched.step` / `bsmd0402l-004-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bsmd0402l-004.step` / `bsmd0402l-004.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BHFUSE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603349812737818624) (6 pp, sha256 `53b2016119f36329`, 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/bsmd0402l-004-datasheet.pdf)