component

BZX84-B43

Public Made by Adom

by adom

Nexperia Zener Diodes, SOT-23(TO-236AB). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentdiodesbzx84-b43factory-2.0.0extractor-text

Verified BZX84-B43

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: BZX84-B43 · SOT-23(TO-236AB) · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 14-page datasheet
  • ✓distributor: lcsc C550921, digikey 4878-BZX84B43CT-ND, mouser 637-BZX84B43
  • ✓family: SOT-23
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-c7y72kfc/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.10)
  • ✓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✓ bzx84-b43.kicad_sym✓ bzx84-b43.kicad_mod✓ bzx84-b43.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray
viewers bzx84-b43: viewers rendered from the public page · Ray
bzx84-b43-etched.glb bzx84-b43: factory component page (tier=mfr) · Ray
bzx84-b43-etched.step bzx84-b43: factory component page (tier=mfr) · Ray
bzx84-b43-hero.glb bzx84-b43: hero GLB from the etched model (keeps the MPN mark) · Ray
bzx84-b43-hero.overlay.json bzx84-b43: hero GLB from the etched model (keeps the MPN mark) · Ray
bzx84-b43.glb Publish 0.1.0 · Ray
bzx84-b43.kicad_mod Publish 0.1.0 · Ray
bzx84-b43.kicad_sym Publish 0.1.0 · Ray
bzx84-b43.lbr Publish 0.1.0 · Ray
bzx84-b43.step Publish 0.1.0 · Ray
package.json Publish 0.1.0 · Ray
page.json Set visibility: public · Ray
README.md Publish 0.1.0 · Ray
verification.json Verified: Published by the parts factory: tier mfr, 3 pins · Ray

BZX84-B43

Nexperia · Zener Diodes · SOT-23(TO-236AB)

BZX84-B43 from Nexperia, in a SOT-23(TO-236AB). 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 voltage regulator diode; the datasheet limits the device forward current IF to 200 mA maximum (Table 5).
2 n.c. unconnected Not connected; the pinning table lists this pin as not connected.
3 K passive Cathode of the voltage regulator diode; for BZX84-B43 the working voltage VZ is 42.10 V minimum to 43.90 V maximum at IZ = 2 mA (Table 9).

Key specifications

Parameter Value
Manufacturer Nexperia
Package SOT-23(TO-236AB)
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
Working voltage (nominal, type 43) VZ 42.1 43 43.9 V IZ = 2 mA; Tj = 25 °C (BZX84-B row, Table 9) 7
Working voltage tolerance (B series) -2 2 % BZX84-B E24 series tolerance ±2 % 1
Maximum differential resistance rdif 375 Ω IZ = 0.5 mA 7
Maximum differential resistance rdif 150 Ω IZ = 2 mA 7
Reverse current IR 0.05 μA Max VR column = 30.1 V 7
Temperature coefficient SZ 37.6 46.6 mV/K IZ = 2 mA 7
Diode capacitance Cd 40 pF f = 1 MHz; VR = 0 V 7
Non-repetitive peak reverse current IZSM 0.6 A tp = 100 μs; square wave; Tj = 25 °C 7
Forward voltage VF 0.9 V IF = 10 mA; pulse test tp ≤ 100 μs; δ ≤ 0.02 4
Forward current IF 200 mA 4
Non-repetitive peak reverse power dissipation PZSM 40 W tp = 100 μs; square wave; Tj = 25 °C prior to surge 4
Total power dissipation Ptot 250 mW Tamb ≤ 25 °C; FR4 PCB, standard footprint 4
Junction temperature Tj 150 °C 4
Ambient temperature Tamb -55 150 °C 4
Storage temperature Tstg -65 150 °C 4
Thermal resistance junction to ambient Rth(j-a) 500 K/W in free air; FR4 PCB, single-sided 70 µm copper, standard footprint 4
Thermal resistance junction to solder point Rth(j-sp) 330 K/W soldering point of cathode tab 4

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

  • Symbol: BZX84-B43
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23(TO-236AB), generated on the KiCad land (body 1.3 x 2.9 mm, terminals on the pads, 1.0 mm tall, datasheet A, midpoint of min and max). 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: bzx84-b43-etched.step / bzx84-b43-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bzx84-b43.step / bzx84-b43.glb are the bare package body.

Provenance

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

  • Datasheet: Nexperia datasheet (14 pp, sha256 e6278027e055c1b0, retrieved 2026-11-13, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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