# BLM18AG221SN1D: 220 Ohm 0603 Ferrite Bead

General-purpose Murata ferrite bead for supply-rail noise filtering. 220 ohm impedance at 100 MHz with a 2 A current rating and 50 mohm DC resistance, in the 0603 (1608 metric) size.

## Key specs

| Parameter | Value |
|---|---|
| Impedance | 220 ohm at 100 MHz (+/-25 percent) |
| Rated current | 2 A |
| DC resistance | 50 mohm max |
| Size | 0603 (1608 metric) |

## Where it is used

Six of these filter the analog supply pins on the [Large Automotive Eth Switch Molecule](https://wiki.adom.inc/adom/large-automotive-eth-switch-molecule): the LAN9374 and KSZ9131 AVDD rails and the STM32H563 VDDA rail each get a bead plus local decoupling.

## Ordering

| Vendor | Part number |
|---|---|
| Murata | BLM18AG221SN1D |

## Files

| File | What |
|---|---|
| `blm18ag221sn1d.kicad_sym` | KiCad symbol (2 pins) |
| `L_0603_1608Metric.kicad_mod` | KiCad footprint |
| `blm18ag221sn1d.step` / `blm18ag221sn1d.glb` | 3D model |
| `blm18ag221sn1d.lbr` | Fusion 360 / EAGLE library |
| `blm18ag221sn1d.adom-lbr.json` | adom-lbr canonical JSON |