component
SZMM3Z9V1ST1G
Public Made by Adomby adom
onsemi Zener Diodes, SOD-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownSZMM3Z9V1ST1G
onsemi · Zener Diodes · SOD-323
SZMM3Z9V1ST1G from onsemi, 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 | Cathode | passive | Cathode (marked by polarity band); the Zener voltage regulator is reverse-biased here, with VZ 8.85 V min to 9.23 V max at IZT = 5.0 mA for the 9V1 device. |
| 2 | Anode | passive | Anode of the Zener diode, with forward voltage VF of 0.9 V max at IF = 10 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| 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 | 8.85 | 9.23 | V | IZT = 5.0 mA, TA = 25°C | 3 | |
| Maximum Zener Impedance at IZK | ZZK | 160 | Ω | IZ = 0.5 mA | 3 | ||
| Maximum Zener Impedance at IZT | ZZT | 15 | Ω | IZ = IZT @ 10% Mod | 3 | ||
| Reverse Leakage Current | IR | 0.5 | µA | VR = 6.0 V | 3 | ||
| Temperature Coefficient of VZ | dVZ/dt | 3.8 | 7 | mV/K | IZT1 = 5 mA | 3 | |
| Capacitance | C | 130 | pF | VR = 0, f = 1 MHz | 3 | ||
| Forward Voltage | VF | 0.9 | V | IF = 10 mA | 2 | ||
| Test Current | IZT | 5 | mA | 3 | |||
| Total Device Dissipation | PD | 300 | mW | FR-4 board, TA = 25°C | 2 | ||
| Derate above 25°C | 2.4 | mW/°C | FR-4 board | 2 | |||
| Thermal Resistance Junction-to-Ambient | RθJA | 416 | °C/W | 2 | |||
| Junction and Storage Temperature Range | TJ, Tstg | -65 | 150 | °C | 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 | LEADS: Plated with Pb−Sn or Sn only (Pb−Free) POLARITY: Cathode indicated by polarity band | 1 |
CAD (KiCad official)
- Symbol:
SZMM3Z9V1ST1G - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
szmm3z9v1st1g-etched.step/szmm3z9v1st1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);szmm3z9v1st1g.step/szmm3z9v1st1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (6 pp, sha256
64232f49c56f3413, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-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).