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BLM21BD331SN1D

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Murata Electronics Ferrite Beads, 0805. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BLM21BD331SN1D

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); blm21bd331sn1d.step / blm21bd331sn1d.glb are 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, 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