# MINISMDC300F-2

**Littelfuse** · Resettable Fuses · 1812

MINISMDC300F-2 from Littelfuse, 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 | Terminal 1 of an unpolarised fuse; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised fuse; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| Package | 1812 |
| 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 |
|---|---|---|---|---|---|---|---|
| Resistance (min) |  | 0.011 |  |  | OHMS | At 25°C | 1 |
| Resistance (max) |  |  |  | 0.036 | OHMS | At 25°C; max measured 1 hour after reflow | 1 |
| Time to trip |  |  |  | 5 | SECONDS | At 25°C, 8A | 1 |
| Tripped-state power dissipation |  |  |  | 1 | WATTS | At 25°C, 6V | 1 |
| Maximum electrical rating - voltage |  |  |  | 6 | VDC |  | 1 |
| Maximum electrical rating - short circuit current |  |  |  | 100 | A |  | 1 |
| Hold current |  |  | 3.3 |  | AMPERES | At 0°C | 1 |
| Trip current |  |  | 7 |  | AMPERES | At 0°C | 1 |
| Hold current |  |  | 3 |  | AMPERES | At 25°C | 1 |
| Trip current |  |  | 6 |  | AMPERES | At 25°C | 1 |
| Hold current |  |  | 2.35 |  | AMPERES | At 60°C | 1 |
| Trip current |  |  | 4.56 |  | AMPERES | At 60°C | 1 |

## CAD (KiCad official)

- Symbol: `MINISMDC300F-2`
- Footprint: `Fuse:Fuse_1812_4532Metric`
- 3D model: 1812, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal _1806_ height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `minismdc300f-2-etched.step` / `minismdc300f-2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `minismdc300f-2.step` / `minismdc300f-2.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Littelfuse datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589904979349053440) (2 pp, sha256 `39abc3ad5cd600ed`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `two-terminal convention` (convention), consensus `off` (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/minismdc300f-2-datasheet.pdf)