# BSMD1210L-260

**BHFUSE** · Resettable Fuses · 1210

BSMD1210L-260 from BHFUSE, in a 1210. 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 | Terminal 1 of the non-polarized resettable PTC fuse (Ihold 2.60 A, Itrip 5.20 A, Vmax 6.0 Vdc, Imax 50 A); pad 1.00±0.1 mm x 2.70±0.1 mm. |
| 2 | 2 | passive | Terminal 2 of the non-polarized resettable PTC fuse (Ihold 2.60 A, Itrip 5.20 A, Vmax 6.0 Vdc, Imax 50 A); pad 1.00±0.1 mm x 2.70±0.1 mm, 2.00±0.1 mm gap from terminal 1. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BHFUSE |
| Package | 1210 |
| 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 |  |  | 2.6 | A | 25℃ still air | 1 |
| Trip current (Itrip) | Itrip | 5.2 |  |  | A | 25℃ still air | 1 |
| Maximum voltage (Vmax) | Vmax |  |  | 6 | Vdc | At rated current (Imax) | 1 |
| Maximum fault current (Imax) | Imax |  |  | 50 | A | At rated voltage (Vmax) | 1 |
| Typical power dissipated in tripped state (Pd) | Pd |  | 1.2 |  | W | 25℃ still air, tripped state | 1 |
| Time to trip |  |  | 13 |  | Sec | 25℃ | 1 |
| Minimum resistance in initial state (Rmin) | Rmin | 0.004 |  |  | Ω | Initial (un-soldered) state | 1 |
| Maximum resistance after trip or reflow (R1max) | R1max |  |  | 0.015 | Ω | 25℃, measured one hour after tripping or reflow soldering at 260℃ for 20 sec | 1 |
| Ambient operating temperature |  | -40 |  | 85 | ℃ | Ambient operating conditions | 3 |
| Maximum surface temperature in tripped state |  |  |  | 125 | ℃ | Device in tripped state | 3 |

## CAD (KiCad official)

- Symbol: `BSMD1210L-260`
- Footprint: `Fuse:Fuse_1210_3225Metric`
- 3D model: 1210 (KiCad packages3D, STEP)
- 3D model files: `bsmd1210l-260-etched.step` / `bsmd1210l-260-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bsmd1210l-260.step` / `bsmd1210l-260.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/8618847306045276160) (7 pp, sha256 `16be034a18f85d4c`, 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/bsmd1210l-260-datasheet.pdf)