# LQH43MN681K03L

**Murata Electronics** · Power Inductors · 1812

LQH43MN681K03L from Murata Electronics, 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 inductor or ferrite bead; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised inductor or ferrite bead; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Murata Electronics |
| Package | 1812 |
| Category | Inductors, Coils, Chokes |
| 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 |
|---|---|---|---|---|---|---|---|
| Inductance tolerance (code K) | L | -10 |  | 10 | % |  | 166 |
| Inductance | L |  | 680 |  | μH | Test frequency 1kHz | 166 |
| Q (min.) | Q | 40 |  |  |  | Q test frequency 796kHz | 166 |
| Max. DC resistance | DCR |  |  | 17 | Ω |  | 166 |
| Rated current | IR |  | 65 |  | mA | Self-temperature rise limited to 20°C max and inductance within ±10% of initial value when rated current is applied | 166 |
| S.R.F. (min.) | SRF | 2.5 |  |  | MHz |  | 166 |
| Operating temperature range | Top | -40 |  | 85 | °C | Operating temp. range; class of magnetic shield: no shield | 166 |

## CAD (KiCad official)

- Symbol: `LQH43MN681K03L`
- Footprint: `Inductor_SMD:L_1812_4532Metric`
- 3D model: 1812 (KiCad packages3D, STEP)
- 3D model files: `lqh43mn681k03l-etched.step` / `lqh43mn681k03l-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lqh43mn681k03l.step` / `lqh43mn681k03l.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Murata Electronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590164079571730432) (274 pp, sha256 `8814cd5dd6d20065`, retrieved 2026-10-18, 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/lqh43mn681k03l-datasheet.pdf)