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BZX84B18-7-F

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

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BZX84B18-7-F

Diodes Incorporated · Zener Diodes · SOT-23

BZX84B18-7-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, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 A passive Zener anode, connected to the bottom-left terminal in the device schematic.
2 NC unconnected Bottom-right terminal, shown with no internal connection in the device schematic.
3 K passive Zener cathode, the single top terminal in the device schematic; the BZX84B18 has VZ 17.6V to 18.4V at IZT = 5.0mA.

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 VZ 17.6 18 18.4 V @ IZT = 5.0 mA; Nom 18 V 2
Zener voltage tolerance VZ -2 2 % Tolerance on VZ (Features) 1
Maximum Zener impedance ZZT 45 Ω @ IZT = 5.0 mA, f = 1 kHz 2
Maximum Zener impedance ZZK 225 Ω @ IZK = 1.0 mA 2
Maximum reverse current IR 0.1 µA VR = 12.6 V 2
Temperature coefficient 12.4 16 mV/°C @ IZT = 5.0 mA 2
Power dissipation PD 300 mW Note 5: FR-4 PCB with recommended pad layout 2
Power dissipation PD 350 mW Note 6: terminals kept at ambient temperature 2
Thermal resistance, junction to ambient air RϴJA 417 °C/W Note 5 2
Thermal resistance, junction to ambient air RϴJA 357 °C/W Note 6 2
Operating and storage temperature range TJ, TSTG -65 150 °C 2
Forward voltage VF 0.9 V @ IF = 10 mA 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: Solderable per MIL-STD-202, Method 208 Lead-Free Plating (Matte Tin Finish Annealed over Alloy 42 Leadframe). 1

CAD (KiCad official)

  • Symbol: BZX84B18-7-F
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: bzx84b18-7-f-etched.step / bzx84b18-7-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bzx84b18-7-f.step / bzx84b18-7-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 d7505f68264bd157, retrieved 2026-10-20, 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