component
MM3Z3V9T1G
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
markdownMM3Z3V9T1G
onsemi · Zener Diodes · SOD-323
MM3Z3V9T1G 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 of the Zener diode, indicated by the polarity band; Zener voltage 3.9 V nominal (3.7 V min to 4.1 V max) at IZT = 5 mA. |
| 2 | ANODE | passive | Anode of the Zener diode (SOD-323 Case 477 Style 1, pin 2). |
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 | 3.7 | 3.9 | 4.1 | V | @ IZT = 5 mA, TA = 25°C | 2 |
| Maximum Zener Impedance | ZZT | 90 | Ω | @ IZT = 5 mA | 2 | ||
| Maximum Zener Impedance | ZZK | 1000 | Ω | @ IZK = 0.5 mA | 2 | ||
| Reverse Leakage Current | IR | 3 | µA | @ VR = 1.0 V | 2 | ||
| Temperature Coefficient of VZ | VZ | -3.5 | -2.5 | mV/k | @ IZT = 5 mA | 2 | |
| Maximum Capacitance | C | 450 | pF | @ VR = 0 and f = 1 MHz | 2 | ||
| Forward Voltage | VF | 0.9 | V | @ IF = 10 mA, all types | 2 | ||
| Total Device Dissipation | PD | 300 | mW | FR-4 board, TA = 25°C | 1 | ||
| Derate above 25°C | PD | 2.4 | mW/°C | FR-4 board, above 25°C | 1 | ||
| Thermal Resistance, Junction-to-Ambient | RθJA | 416 | °C/W | FR-4 board, single-sided copper, mounting pad 1 cm2 | 1 | ||
| Junction and Storage Temperature Range | TJ, Tstg | -65 | 150 | °C | 1 |
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:
MM3Z3V9T1G - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
mm3z3v9t1g-etched.step/mm3z3v9t1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm3z3v9t1g.step/mm3z3v9t1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (5 pp, sha256
be0d734edc03a774, 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).