component
BLM21BD331SN1D
Public Made by Adomby adom
Murata Electronics Ferrite Beads, 0805. 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
markdownBLM21BD331SN1D
Murata Electronics · Ferrite Beads · 0805
BLM21BD331SN1D 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 two-terminal ferrite bead (330 ohm typ. at 100MHz, rated 300 mA, 0.3 ohm max. DC resistance initial); terminals are interchangeable. |
| 2 | 2 | passive | Second electrode of the two-terminal ferrite bead, in series with the first through the inductor-plus-resistance equivalent circuit; operating range -55°C to +125°C. |
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 |
|---|---|---|---|---|---|---|---|
| DC resistance | 0.3 | 0.4 | Ω | Initial values; measured with digital multimeter, excludes substrate and wire resistance | 2 | ||
| Impedance tolerance at 100MHz | -25 | 25 | % | at 100MHz±1MHz | 2 | ||
| Impedance at 100MHz | 330 | Ω | at 100MHz±1MHz | 2 | |||
| Rated current | 300 | mA | 2 | ||||
| Operating temperature | -55 | 125 | °C | 3 | |||
| Storage temperature | -55 | 125 | °C | 3 | |||
| Impedance change after resistance to soldering heat | -30 | 30 | % | At 100MHz after soldering heat test (Sn-3.0Ag-0.5Cu, 270°C±5°C, 10s±0.5s); BLM21SN type is ±50%, not this part | 4 |
CAD (KiCad official)
- Symbol:
BLM21BD331SN1D - Footprint:
Inductor_SMD:L_0805_2012Metric - 3D model: 0805 (KiCad packages3D, STEP)
- 3D model files:
blm21bd331sn1d-etched.step/blm21bd331sn1d-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);blm21bd331sn1d.step/blm21bd331sn1d.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Murata Electronics datasheet (10 pp, sha256
778f317c7d9e698b, retrieved 2026-11-07, 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).