# BLM21AG102SN1D

**Murata Electronics** · Ferrite Beads · 0805

BLM21AG102SN1D 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 the two-terminal ferrite bead (series element, symmetric with terminal 2); 1000Ω ±25% impedance at 100MHz, rated current 600mA, DC resistance 0.27Ω max initial. |
| 2 | 2 | passive | Terminal 2 of the two-terminal ferrite bead (series element, symmetric with terminal 1); 1000Ω ±25% impedance at 100MHz, rated current 600mA, DC resistance 0.27Ω max initial. |

## 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 |
|---|---|---|---|---|---|---|---|
| Impedance tolerance | Z | -25 |  | 25 | % | at 100MHz; printed as 1000±25% | 3 |
| DC resistance | DCR |  |  | 0.37 | Ω | Digital multi meter; except resistance of substrate and wire | 3 |
| Rated current |  |  |  | 600 | mA | No *1 derating mark on this part | 3 |
| Operating temperature |  | -55 |  | 125 | °C |  | 3 |
| Storage temperature |  | -55 |  | 125 | °C |  | 3 |
| Impedance (nominal) | Z |  | 1000 |  | Ω | at 100MHz; measured per 7-1-1 (Keysight 4291A, 100MHz±1MHz) | 3 |
| DC resistance (typical) | DCR |  | 0.27 |  | Ω | Digital multi meter; except resistance of substrate and wire | 3 |

## CAD (KiCad official)

- Symbol: `BLM21AG102SN1D`
- Footprint: `Inductor_SMD:L_0805_2012Metric`
- 3D model: 0805 (KiCad packages3D, STEP)
- 3D model files: `blm21ag102sn1d-etched.step` / `blm21ag102sn1d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `blm21ag102sn1d.step` / `blm21ag102sn1d.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/8586175842090803200) (11 pp, sha256 `651645d072b5710a`, 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/blm21ag102sn1d-datasheet.pdf)