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AD-MMSZ4678

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Changjing Zener Diodes, SOD-123. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

componentdiodesad-mmsz4678factory-2.0.0extractor-text

Verified AD-MMSZ4678

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier lcsc, 2 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: AD-MMSZ4678 · SOD-123 · 2 pins
  • ✓copper: 2 copper pads, none touching another net
  • ✓datasheet: all 2 pin names found in the 6-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: D_SOD-123F
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-002p_esi/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 2 pins = 2 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 2 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ ad-mmsz4678.kicad_sym✓ ad-mmsz4678.kicad_mod✓ ad-mmsz4678.step
Spot something wrong? Report it as an issue Propose a fix Records are signed by members of adom.
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ad-mmsz4678 / README.md
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Ray Publish 0.1.0 5e9b71e 3d ago

AD-MMSZ4678

Changjing · Zener Diodes · SOD-123

AD-MMSZ4678 from Changjing, in a SOD-123. 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-123
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 1.71 1.8 1.89 V @ IZT = 50 µA (pulsed, TP ≤ 1.0 ms) 2
Maximum reverse current IR 7.5 µA @ VR = 1.0 V 2
Forward voltage VF 0.9 V @ IF = 10 mA 1
Power dissipation PD 500 mW Device mounted on 1 inch² FR-4 board, 2 oz. copper, still air, Ta = 25°C 1
Thermal resistance from junction to ambient RθJA 250 °C/W Device mounted on 1 inch² FR-4 board, 2 oz. copper, still air, Ta = 25°C 1
Operating junction and storage temperature range Tj, Tstg -55 150 °C 1

CAD (KiCad official)

  • Symbol: AD-MMSZ4678
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: ad-mmsz4678-etched.step / ad-mmsz4678-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ad-mmsz4678.step / ad-mmsz4678.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (6 pp, sha256 9bb1b0d77cb673b9, retrieved 2026-11-05, 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