component
BLM18RK121SN1D
Public Made by Adomby adom
Murata Electronics Ferrite Beads, 0603. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBLM18RK121SN1D
Murata Electronics · Ferrite Beads · 0603
BLM18RK121SN1D 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 | One electrode of the two-terminal ferrite bead (series inductor plus resistance); 120 ohm ±25% impedance at 100MHz, rated 200 mA, DC resistance 0.25 ohm max. |
| 2 | 2 | passive | Second electrode of the two-terminal ferrite bead, interchangeable with the other terminal (non-polarized, no marking); rated 200 mA, operating temperature -55°C to +125°C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Murata Electronics |
| Package | 0603 |
| Category | Filters |
| Pins | 2 |
Electrical characteristics
Limits from the LCSC catalog entry for this part (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Impedance | Z | 120 | Ω | at 100 MHz, catalog attribute (LCSC C237533) | catalog | ||
| Tolerance | -25 | 25 | % | catalog attribute (LCSC C237533) | catalog | ||
| Rated current | 200 | mA | catalog attribute (LCSC C237533) | catalog | |||
| Operating temperature | -55 | 125 | °C | catalog description (LCSC C237533) | catalog |
CAD (KiCad official)
- Symbol:
BLM18RK121SN1D - Footprint:
Inductor_SMD:L_0603_1608Metric - 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files:
blm18rk121sn1d-etched.step/blm18rk121sn1d-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);blm18rk121sn1d.step/blm18rk121sn1d.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Murata Electronics datasheet (12 pp, sha256
349daf9c17642f60, retrieved 2026-10-25, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).