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AD-MMSZ5252BS

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Changjing Zener Diodes, SOD-323. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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AD-MMSZ5252BS

Changjing · Zener Diodes · SOD-323

AD-MMSZ5252BS from Changjing, in a SOD-323. 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 K passive Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint.
2 A passive Anode.

Key specifications

Parameter Value
Manufacturer Changjing
Package SOD-323
Category Diodes
Pins 2

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 22.8 24 25.2 V IZT = 5.2 mA, Tj = 25°C, tested with pulses TP ≤ 1.0ms 2
Maximum Zener impedance ZZT 33 Ω IZT = 5.2 mA, f = 1kHz 2
Maximum Zener impedance (knee) ZZK 600 Ω IZK = 0.25 mA, f = 1kHz 2
Maximum reverse current IR 0.1 µA VR = 18 V 2
Forward voltage VF 0.9 V IF = 10mA, Tj = 25°C 1
Power dissipation PD 200 mW Tj = 25°C 1
Thermal resistance from junction to ambient RθJA 625 °C/W Device mounted on ceramic PCB 7.6 mm x 9.4 mm x 0.87 mm, pad area 25 mm2 1
Operating junction and storage temperature range Tj, Tstg -55 150 °C 1
Zener test current IZT 5.2 mA Test current for VZ and ZZT 2
Zener knee test current IZK 0.25 mA Test current for ZZK 2

CAD (KiCad official)

  • Symbol: AD-MMSZ5252BS
  • Footprint: Diode_SMD:D_SOD-323
  • 3D model: SOD-323 (KiCad packages3D, STEP)
  • 3D model files: ad-mmsz5252bs-etched.step / ad-mmsz5252bs-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ad-mmsz5252bs.step / ad-mmsz5252bs.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (6 pp, sha256 4b88592edad97ad2, retrieved 2026-10-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary cathode-band convention (convention), consensus off (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