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BZX84C3V9-7-F

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Diodes Incorporated Zener Diodes, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentdiodesbzx84c3v9-7-ffactory-2.0.0extractor-text

Verified BZX84C3V9-7-F

by Ray · last 13 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

13 Nov 2026RayPublished by the parts factory: tier mfr, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • •array (skip): not an array of element pairs
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: BZX84C3V9-7-F · SOT-23 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 5-page datasheet
  • ✓distributor: lcsc C260854, digikey BZX84C3V9-FDITR-ND, mouser 621-BZX84C3V9-F
  • ✓family: SOT-23
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-l4a_fh7n/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.4)
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓symbol_text: no pin names collide
  • ✓viewers: viewers/footprint.html 17 kB, viewers/symbol.html 7 kB
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ bzx84c3v9-7-f.kicad_sym✓ bzx84c3v9-7-f.kicad_mod✓ bzx84c3v9-7-f.step
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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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Contents

README

markdown

BZX84C3V9-7-F

Diodes Incorporated · Zener Diodes · SOT-23

BZX84C3V9-7-F from Diodes Incorporated, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model). Symbol and footprint from KiCad-official CAD; the 3D model is generated from the datasheet's package dimensions.

Pinout

Pin Name Type Function
1 A passive Anode of the Zener diode (bottom-left terminal in the device schematic), connected to the Zener junction; BZX84C3V9 has VZ 3.7V to 4.1V at IZT = 5.0mA.
2 NC unconnected Bottom-right terminal in the device schematic, which shows no internal connection to the Zener die.
3 K passive Cathode of the Zener diode (top terminal in the device schematic), which is the positive side in reverse breakdown; the datasheet gives IR of 3.0µA max at VR = 1.0V.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-23
Category Diodes
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Zener voltage (nominal 3.9 V, min) VZ 3.7 3.9 4.1 V @ IZT = 5.0 mA 2
Maximum Zener impedance ZZT 90 Ω @ IZT = 5.0 mA, f = 1 kHz 2
Maximum Zener impedance (knee) ZZK 600 Ω @ IZK = 1.0 mA, f = 1 kHz 2
Maximum reverse current IR 3 µA @ VR = 1.0 V 2
Temperature coefficient -3.5 0 mV/C @ IZT 2
Forward voltage VF 0.9 V @ IF = 10 mA 2
Power dissipation (Note 6) PD 300 mW Note 6: FR-4 PC board with recommended pad layout 2
Power dissipation (Note 7) PD 350 mW Note 7: terminals kept at ambient temperature 2
Thermal resistance, junction to ambient air (Note 6) RθJA 417 °C/W Note 6: FR-4 PC board with recommended pad layout 2
Thermal resistance, junction to ambient air (Note 7) RθJA 357 °C/W Note 7: terminals kept at ambient temperature 2
Operating and storage temperature range TJ, TSTG -65 150 °C 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin  Terminals: Matte Tin Finish Annealed over Alloy 42 Leadframe (Lead Free Plating). Solderable per MIL-STD-202, Method 208 1

CAD (land: KiCad; 3D: generated from the datasheet)

  • Symbol: BZX84C3V9-7-F
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23, generated on the KiCad land (body 1.3 x 2.9 mm, terminals on the pads, 1.025 mm tall, datasheet A, nominal). KiCad's stock model for this land is taller than the datasheet allows, so the model is generated from the datasheet drawing; the dimensions come from the datasheet drawing where it was read and are defaults otherwise (see provenance.model_3d_generated), not the manufacturer's CAD (STEP)
  • 3D model files: bzx84c3v9-7-f-etched.step / bzx84c3v9-7-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bzx84c3v9-7-f.step / bzx84c3v9-7-f.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (5 pp, sha256 70c346b571aa2f8b, retrieved 2026-11-13, tier: manufacturer)
  • 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: land: KiCad official libraries (CC-BY-SA 4.0); 3D: generated from the datasheet's package dimensions (provenance.model_3d_generated).

Datasheet PDF