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AZ23C18

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

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AZ23C18

Changjing · Zener Diodes · SOT-23

AZ23C18 from Changjing, 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 K1 passive Cathode of zener diode 1 in the dual common-anode pair (VZ 16.8-19.1 V at IZT=5.0mA for AZ23C18, 300mW total power dissipation).
2 K2 passive Cathode of zener diode 2 in the dual common-anode pair (VZ 16.8-19.1 V at IZT=5.0mA for AZ23C18, VZ matched within 5% to diode 1).
3 A passive Common anode of both zener diodes, shared by pins 1 and 2 (forward voltage 0.9 V at IF=10mA).

Key specifications

Parameter Value
Manufacturer Changjing
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 range, AZ23C18) VZ 16.8 19.1 V @IZT=5.0mA; short duration test pulse (note 1) 2
Maximum Zener impedance ZZT 50 Ω @IZT=5.0mA; f=1kHz (note 2) 2
Maximum Zener impedance (knee) ZZk 170 Ω @IZk=1.0mA 2
Min reverse voltage VR 14 V @IR=0.1μA 2
Power dissipation rating PD 300 mW Ta=25℃ 1
Operation junction and storage temperature range TJ,TSTG -55 150 ℃ 1
Zener voltage matching between both diodes in one case ΔVz -5 5 % both diodes in one case (features) 1
Typical temperature coefficient Tc 0.09 %/℃ @IR=0.1μA row, typical value for AZ23C18 2
Forward voltage VF 0.9 V @ IF = 10mA 1
Thermal resistance from junction to ambient RθJA 417 ℃/W 1

CAD (KiCad official)

  • Symbol: AZ23C18
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: az23c18-etched.step / az23c18-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); az23c18.step / az23c18.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (5 pp, sha256 9d98037b38f83739, retrieved 2026-10-18, 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