# BSMD0805-025-9V

**BHFUSE** · Resettable Fuses · 0805

BSMD0805-025-9V from BHFUSE, in a 0805. 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 PPTC device (Ihold 0.25 A, Itrip 0.55 A, Vmax 9 Vdc, Imax 40 A); the datasheet drawing shows two end pads and no pin numbers. |
| 2 | 2 | passive | Other terminal of the non-polarized PPTC device (Ihold 0.25 A, Itrip 0.55 A, Vmax 9 Vdc, Imax 40 A); the datasheet drawing shows two end pads and no pin numbers. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BHFUSE |
| Package | 0805 |
| 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 (Ihold) | Ihold |  | 0.25 | 0.25 | A | 25℃ still air; maximum current device passes without tripping | 2 |
| Trip current (Itrip) | Itrip | 0.55 |  |  | A | 25℃ still air; minimum current at which device trips | 2 |
| Maximum voltage (Vmax) | Vmax |  |  | 9 | Vdc | Maximum voltage device can withstand without damage at rated current (Imax) | 2 |
| Maximum fault current (Imax) | Imax |  |  | 40 | A | Maximum fault current device can withstand without damage at rated voltage (Vmax) | 2 |
| Power dissipated in tripped state (Pd typ.) | Pd |  | 0.5 |  | W | Typical, tripped state at 25℃ still air | 2 |
| Time to trip |  |  | 0.4 |  | Sec | At 8.00 A test current (as printed in Time to trip column) | 2 |
| Minimum resistance (Rmin) | Rmin | 0.02 |  |  | Ω | Initial un-soldered state | 2 |
| Maximum resistance after trip or reflow (R1max) | R1max |  |  | 3.2 | Ω | 25℃, measured one hour after tripping or reflow soldering at 260℃ for 20 sec | 2 |
| Ambient operating temperature |  | -40 |  | 85 | ℃ | Ambient operating conditions | 5 |
| Maximum surface temperature in tripped state |  |  |  | 125 | ℃ | Device in the tripped state | 5 |

## CAD (KiCad official)

- Symbol: `BSMD0805-025-9V`
- Footprint: `Fuse:Fuse_0805_2012Metric`
- 3D model: 0805 (KiCad packages3D, STEP)
- 3D model files: `bsmd0805-025-9v-etched.step` / `bsmd0805-025-9v-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bsmd0805-025-9v.step` / `bsmd0805-025-9v.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/8590923065340096512) (9 pp, sha256 `ce9d7fc17687a96e`, retrieved 2026-10-18, 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/bsmd0805-025-9v-datasheet.pdf)