# BLM21AG102SH1D

**Murata Electronics** · Ferrite Beads · 0805

BLM21AG102SH1D 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 | First electrode of the single-circuit ferrite bead (1000±25% Ω at 100MHz, 0.27Ω max DC resistance at 85°C, 600mA rated current); the part is non-polar and the terminals are interchangeable. |
| 2 | 2 | passive | Second electrode of the single-circuit ferrite bead (1000±25% Ω at 100MHz, 0.27Ω max DC resistance at 85°C, 600mA rated current); the part is non-polar and the terminals are interchangeable. |

## 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 at 100 MHz |  | -25 |  | 25 | % | Impedance measured at 100MHz±1MHz (Keysight 4291A, 16192A fixture) | 2 |
| DC resistance max (first printed value) |  |  |  | 0.27 | Ω | Standard testing conditions (*1); column label unclear, see review | 2 |
| DC resistance max (second printed value) |  |  |  | 0.37 | Ω | Standard testing conditions (*1); column label unclear, see review | 2 |
| Impedance change after mechanical shock (Table B) |  | -30 |  | 30 | % | MIL-STD-202 Method 213, Condition F, 1500g/0.5ms half sine; impedance change at 100MHz | 4 |
| Impedance change after vibration (Table B) |  | -30 |  | 30 | % | 5g, 10-2000Hz, 20 min x 12 cycles x 3 orientations; impedance change at 100MHz | 4 |
| Impedance change after board flex (Table B) |  | -30 |  | 30 | % | Board flex 2mm min, 60s min holding; impedance change at 100MHz | 4 |
| Impedance change after electrical characterization |  | -30 |  | 30 | % | AEC-Q200 item 19, impedance change at 100MHz (applies to BLM21 except SN series) | 4 |
| Operating temperature |  | -55 |  | 125 | °C |  | 2 |
| Storage temperature |  | -55 |  | 125 | °C |  | 2 |
| Impedance at 100MHz (nominal) |  |  | 1000 |  | Ω | Measured at 100MHz±1MHz | 2 |
| Rated current |  |  | 600 |  | mA | No derating mark (*2) printed for this part | 2 |

## CAD (KiCad official)

- Symbol: `BLM21AG102SH1D`
- Footprint: `Inductor_SMD:L_0805_2012Metric`
- 3D model: 0805 (KiCad packages3D, STEP)
- 3D model files: `blm21ag102sh1d-etched.step` / `blm21ag102sh1d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `blm21ag102sh1d.step` / `blm21ag102sh1d.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/8588918656184672256) (12 pp, sha256 `4001d89ba5c558f1`, retrieved 2026-10-29, 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/blm21ag102sh1d-datasheet.pdf)