# BLM18SP102SN1D

**Murata Electronics** · Ferrite Beads · 0603

BLM18SP102SN1D from Murata Electronics, in a 0603. 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 | 0603 |
| 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 (rated at 100 MHz, nominal 1000 Ω) |  | -25 |  | 25 | % | Nominal 1000 Ω ±25% at 100 MHz; measured at 100 MHz±1 MHz (Sec. 7.1) | 1 |
| Impedance (typical value at 100 MHz) | /Z/ |  | 1000 |  | Ω | At 100 MHz; measuring frequency 100 MHz±1 MHz (Sec. 7.1) | 1 |
| Rated current, ambient temperature 85°C | IR |  |  | 1200 | mA | Ambient temperature 85°C; derating per diagram applies with operating temperature (diagram not in text) | 1 |
| Rated current, ambient temperature 125°C | IR |  |  | 800 | mA | Ambient temperature 125°C | 1 |
| DC resistance, initial values | RDC |  |  | 0.185 | Ω | Initial values, max; measured per Sec. 7.2 (digital multimeter) | 1 |
| DC resistance, values after testing | RDC |  |  | 0.222 | Ω | Values after testing, max | 1 |
| Operating temperature range | Top | -55 |  | 125 | °C | Operating temperature range | 1 |
| Storage temperature range | Tstg | -55 |  | 125 | °C | Storage temperature range | 1 |
| Impedance change rate after shear test |  | -30 |  | 30 | % | At 100 MHz, after shear test, applying force 6.8 N (Sec. 8.2) | 5 |
| Impedance change rate after bending test |  | -30 |  | 30 | % | At 100 MHz, after bending test, deflection 1.0 mm (Sec. 8.3) | 5 |
| Impedance change rate after vibration test |  | -30 |  | 30 | % | At 100 MHz, after vibration test, total amplitude 1.5 mm (Sec. 8.4) | 5 |
| Impedance change rate after resistance to soldering heat |  | -30 |  | 30 | % | At 100 MHz, after immersion in Sn-3.0Ag-0.5Cu at 270°C±5°C for 10 s (Sec. 8.5) | 5 |
| Impedance change rate after temperature cycle |  | -30 |  | 30 | % | At 100 MHz, after 100 cycles from -55°C to +125°C (Sec. 9.1) | 6 |
| Impedance change rate after humidity test |  | -30 |  | 30 | % | At 100 MHz, after 1000 h at 40°C, 90-95% RH (Sec. 9.2) | 6 |
| Impedance change rate after heat life test |  | -30 |  | 30 | % | At 100 MHz, after 1000 h at 125°C±3°C (85°C±3°C if exceeding rated current 1A), rated current applied (Sec. 9.3) | 6 |
| Impedance change rate after cold resistance test |  | -30 |  | 30 | % | At 100 MHz, after 1000 h at -55°C±2°C (Sec. 9.4) | 6 |

## CAD (KiCad official)

- Symbol: `BLM18SP102SN1D`
- Footprint: `Inductor_SMD:L_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `blm18sp102sn1d-etched.step` / `blm18sp102sn1d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `blm18sp102sn1d.step` / `blm18sp102sn1d.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/8589838302833369088) (12 pp, sha256 `c64f16f8687fd711`, retrieved 2026-10-30, 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/blm18sp102sn1d-datasheet.pdf)