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BLM31KN121SH1L

Public Made by Adom

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Murata Electronics Ferrite Beads, 1206. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BLM31KN121SH1L

Murata Electronics · Ferrite Beads · 1206

BLM31KN121SH1L from Murata Electronics, in a 1206. 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 (120 ohm ±25% at 100MHz, rated 6000 mA at 85°C and 4000 mA at 125°C, 0.009 ohm max DC resistance); the part is not polarized.
2 2 passive The other electrode of the two-terminal ferrite bead, in series with pin 1 (equivalent circuit is an inductor in series with a resistor, and the resistance dominates at high frequencies).

Key specifications

Parameter Value
Manufacturer Murata Electronics
Package 1206
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 C710515) catalog
Tolerance -25 25 % catalog attribute (LCSC C710515) catalog
Rated current 6 A catalog attribute (LCSC C710515) catalog
Operating temperature -55 125 °C catalog description (LCSC C710515) catalog

CAD (KiCad official)

  • Symbol: BLM31KN121SH1L
  • Footprint: Inductor_SMD:L_1206_3216Metric
  • 3D model: 1206 (KiCad packages3D, STEP)
  • 3D model files: blm31kn121sh1l-etched.step / blm31kn121sh1l-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); blm31kn121sh1l.step / blm31kn121sh1l.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Murata Electronics datasheet (8 pp, sha256 3a5d6a95450b2705, 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