# BLM03PX220SN1D

**Murata Electronics** · Ferrite Beads · 0201

BLM03PX220SN1D from Murata Electronics, in a 0201. 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 ferrite bead (series inductor with resistive element at high frequency); 22 ohm ±25% at 100MHz, rated current 1800 mA at 85°C and 1450 mA at 125°C, DC resistance 0.040 ohm max. |
| 2 | 2 | passive | Other electrode of the ferrite bead, interchangeable with the first; the equivalent circuit shows a single two-terminal series element, and the part is operated from -55°C to +125°C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Murata Electronics |
| Package | 0201 |
| Category | Filters |
| 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 |
|---|---|---|---|---|---|---|---|
| DC resistance (initial values), max |  |  |  | 0.04 | Ω | Initial values, DC resistance measured with digital multimeter | 1 |
| DC resistance (after testing), max |  |  |  | 0.045 | Ω | After testing | 1 |
| Rated current at 85°C |  |  |  | 1800 | mA | At 85°C; printed as 1800*1, *1 = derated depending on operating temperature | 1 |
| Rated current at 125°C |  |  |  | 1450 | mA | At 125°C; printed as 1450*1, *1 = derated depending on operating temperature | 1 |
| Impedance tolerance |  | -25 |  | 25 | % | At 100MHz; printed as 22±25% | 1 |
| Operating temperature |  | -55 |  | 125 | °C | Operating temperature | 2 |
| Storage temperature |  | -55 |  | 125 | °C | Storage temperature | 2 |
| Impedance |  |  | 22 |  | Ω | At 100MHz, measured at 100MHz ±1MHz with KEYSIGHT 4291A | 1 |

## CAD (KiCad official)

- Symbol: `BLM03PX220SN1D`
- Footprint: `Inductor_SMD:L_0201_0603Metric`
- 3D model: 0201 (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [Murata Electronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590909462473351168) (9 pp, sha256 `809503121f0c117c`, retrieved 2026-10-25, 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/blm03px220sn1d-datasheet.pdf)