# BLM31KN471SH1L

**Murata Electronics** · Ferrite Beads · 1206

BLM31KN471SH1L from Murata Electronics, in a 1206. 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 electrode of the series ferrite bead (470 ohm ±25% at 100MHz), rated 4000 mA at 85°C and 2700 mA at 125°C, 0.02 ohm max DC resistance initial. |
| 2 | 2 | passive | Second electrode of the series ferrite bead, interchangeable with the other terminal (no polarity shown), operating temperature -55°C to +125°C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Murata Electronics |
| Package | 1206 |
| Category | Filters |
| Pins | 2 |

## Electrical characteristics

Limits from the LCSC catalog entry for this part (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Impedance | Z |  | 470 |  | Ω | at 100 MHz, catalog attribute (LCSC C527608) | catalog |
| Tolerance |  | -25 |  | 25 | % | catalog attribute (LCSC C527608) | catalog |
| Rated current |  |  |  | 4 | A | catalog attribute (LCSC C527608) | catalog |
| Operating temperature |  | -55 |  | 125 | °C | catalog description (LCSC C527608) | catalog |

## CAD (KiCad official)

- Symbol: `BLM31KN471SH1L`
- Footprint: `Inductor_SMD:L_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `blm31kn471sh1l-etched.step` / `blm31kn471sh1l-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `blm31kn471sh1l.step` / `blm31kn471sh1l.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/8583616911641366528) (8 pp, sha256 `46e8425a635cb886`, retrieved 2026-10-19, 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/blm31kn471sh1l-datasheet.pdf)