# BLM21BD222TH1D

**Murata Electronics** · Ferrite Beads · 0805

BLM21BD222TH1D from Murata Electronics, in a 0805. 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 | 0805 |
| 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 max (first printed max column; column header not resolvable in extracted text) |  |  |  | 0.6 | Ω | DC resistance measured with digital multimeter; except resistance of substrate and wire electrode (item 6-1-2) | 1 |
| DC resistance max (second printed max column; column header not resolvable in extracted text) |  |  |  | 0.7 | Ω | DC resistance measured with digital multimeter; except resistance of substrate and wire electrode (item 6-1-2) | 1 |
| Rated current |  |  |  | 200 | mA |  | 1 |
| Impedance tolerance | Z | -25 |  | 25 | % | at 100MHz | 1 |
| Impedance change after mechanical shock/vibration (Table B) | Z | -30 |  | 30 | % | Table B after mechanical shock (item 13) and vibration (item 14); impedance at 100MHz | 3 |
| Impedance change after electrical characterization (item 19) | Z | -30 |  | 30 | % | Electrical characterization, measured impedance at 100MHz (item 19; ±50% applies only to BLM21SN) | 3 |
| Operating temperature |  | -55 |  | 125 | °C |  | 2 |
| Storage temperature |  | -55 |  | 125 | °C |  | 2 |
| ESD rank (2 = 2 kV) |  |  |  | 2 | kV | ESD rank per AEC-Q200-002 (item 17) | 2 |
| Impedance (nominal) | Z |  | 2200 |  | Ω | at 100MHz | 1 |

## CAD (KiCad official)

- Symbol: `BLM21BD222TH1D`
- Footprint: `Inductor_SMD:L_0805_2012Metric`
- 3D model: 0805 (KiCad packages3D, STEP)
- 3D model files: `blm21bd222th1d-etched.step` / `blm21bd222th1d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `blm21bd222th1d.step` / `blm21bd222th1d.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/8603049254659239936) (9 pp, sha256 `d8157e60db966f09`, retrieved 2026-10-17, 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/blm21bd222th1d-datasheet.pdf)