component

SZMMSZ12T3G

Public Made by Adom

by adom

onsemi Zener Diodes, SOD-123. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentdiodesszmmsz12t3g
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3D Model

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Symbol & Footprint

Schematic Symbol

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Datasheet

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Contents

README

markdown

SZMMSZ12T3G

onsemi · Zener Diodes · SOD-123

SZMMSZ12T3G from onsemi, in a SOD-123. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 K passive Cathode of the Zener diode, indicated by the polarity band on the package. In Zener regulation mode, this pin is biased positive relative to the anode; reverse Zener voltage VZ = 12 V nom (11.40-12.60 V) at IZT1 = 5 mA.
2 A passive Anode of the Zener diode. Forward voltage VF <= 0.9 V @ IF = 10 mA; in Zener operation this pin is the return path with reverse leakage IR <= 0.1 uA @ VR = 8 V.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOD-123
Category Diodes
Pins 2

Ordering variants

Same part, different packaging or reel option.

  • SZMMSZ12T3G
  • SZMMSZ12T1G

CAD (KiCad official)

  • Symbol: SZMMSZ12T3G
  • Footprint: Diode_SMD:D_SOD-123
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: szmmsz12t3g-etched.step / szmmsz12t3g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); szmmsz12t3g.step / szmmsz12t3g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (7 pp, sha256 74435c2da806341a, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF