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BZX84B18-E3-08

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

componentdiodesbzx84b18-e3-08factory-2.0.0extractor-text

Verified BZX84B18-E3-08

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: BZX84B18-E3-08 · SOT-23 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 6-page datasheet
  • ✓distributor: lcsc C3009408, digikey 112-BZX84B18-E3-08TR-ND, mouser 78-BZX84B18-E3-08
  • ✓family: SOT-23
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-tt1bxz2o/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height 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✓ bzx84b18-e3-08.kicad_sym✓ bzx84b18-e3-08.kicad_mod✓ bzx84b18-e3-08.step
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3D Model

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Symbol & Footprint

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PCB Footprint

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Datasheet

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Contents

README

markdown

BZX84B18-E3-08

Vishay Intertech · Zener Diodes · SOT-23

BZX84B18-E3-08 from Vishay Intertech, 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 single Zener diode (BZX84B18: VZ 18 V nominal, ±2 %, 17.64 to 18.36 V at IZT1 = 5 mA).
2 NC unconnected Not connected internally; the package schematic shows no connection to the diode.
3 K passive Cathode of the single Zener diode, which is the reverse-biased terminal in Zener operation (Ptot 500 mW, Tj max 150 °C).

Key specifications

Parameter Value
Manufacturer Vishay Intertech
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 VZ 17.64 18 18.36 V at IZT1 = 5 mA 3
Test current IZT1 IZT1 5 mA 3
Test current IZT2 IZT2 1 mA 3
Reverse leakage current IR 0.05 μA at VR = 12.6 V 3
Reverse voltage VR 12.6 V for IR 3
Dynamic resistance ZZ 45 Ω at IZT1, f = 1 kHz 3
Dynamic resistance (knee) ZZK 225 Ω at IZT2, f = 1 kHz 3
Temperature coefficient of VZ αVZ 8 9.5 10-4/°C at IZT1 3
Zener voltage tolerance -2 2 % B grade 1
Power dissipation Ptot 500 mW RthJL = 250 K/W 2
Power dissipation on FR-4 Ptot 300 mW On FR-4 board with recommended soldering footprint 2
Junction temperature Tj 150 °C 2
Storage temperature range Tstg -65 150 °C 2
Operating temperature range Top -55 150 °C 2
Thermal resistance junction to lead RthJL 250 K/W 2
Thermal resistance junction to ambient RthJA 420 K/W According to JEDEC 51-3 on FR-4 board with recommended soldering footprint 2

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

  • Symbol: BZX84B18-E3-08
  • 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, 1.01 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: bzx84b18-e3-08-etched.step / bzx84b18-e3-08-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bzx84b18-e3-08.step / bzx84b18-e3-08.glb are the bare package body.

Provenance

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

  • Datasheet: Vishay Intertech datasheet (6 pp, sha256 d7d519b8048ee97c, 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