component

SI4431-B1-FM

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SILICON LABS RF Transceiver ICs, QFN-20(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentradio frequency chip-antennasi4431-b1-fmfactory-2.0.0extractor-text

Verified SI4431-B1-FM

by Ray · last 31 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier lcsc, 21 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: SI4431-B1-FM · QFN-20(4x4) · 21 pins
  • ✓copper: 21 copper pads, none touching another net
  • ✓datasheet: all 21 pin names found in the 74-page datasheet
  • ✓distributor: lcsc C3606893, digikey 336-2521-5-ND, mouser 634-SI4431-B1-FM
  • ✓family: QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-bnozidd7/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 21 pins = 21 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 21 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ si4431-b1-fm.kicad_sym✓ si4431-b1-fm.kicad_mod✓ si4431-b1-fm.step
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si4431-b1-fm / si4431-b1-fm-etched.step
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Ray si4431-b1-fm: factory component page (tier=lcsc) 96c4be9 4d ago

Binary file: si4431-b1-fm-etched.step

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