# 1812L300

**LUTE** · Resettable Fuses · 1812

1812L300 from LUTE, 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 | One of two interchangeable, non-polarized terminals of the resettable PPTC fuse, placed on a 1.78±0.1 mm wide pad, in series with the protected circuit. |
| 2 | 2 | passive | Second interchangeable, non-polarized terminal of the resettable PPTC fuse, placed on a 1.78±0.1 mm wide pad on the 3.45±0.1 mm pad-layout span, in series with the protected circuit. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `1812L300`
- Footprint: `Resistor_SMD:R_1812_4532Metric`
- 3D model: 1812 (KiCad packages3D, STEP)
- 3D model files: `1812l300-etched.step` / `1812l300-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1812l300.step` / `1812l300.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LUTE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590923776290996224) (11 pp, sha256 `139709b0621cd30a`, retrieved 2026-09-29, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/1812l300-datasheet.pdf)