component
SZMMSZ4V3T1G
Public Made by Adomby adom
onsemi Zener Diodes, SOD-123. 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
markdownSZMMSZ4V3T1G
onsemi · Zener Diodes · SOD-123
SZMMSZ4V3T1G from onsemi, 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 | Cathode | passive | Cathode of the Zener diode, indicated by the polarity band; reverse Zener voltage VZ is 4.09 V min to 4.52 V max (4.3 V nom) at IZT1 = 5 mA for this part. |
| 2 | Anode | passive | Anode of the Zener diode; forward voltage VF is 0.9 V max at IF = 10 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| 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 1 | VZ1 | 4.09 | 4.3 | 4.52 | V | IZT1 = 5 mA, PW = 1 ms, TA = 25°C | 2 |
| Maximum Zener Impedance 1 | ZZT1 | 90 | Ω | IZT1 = 5 mA, IZ(AC) = 0.1 IZ(DC), f = 1 kHz | 2 | ||
| Zener Voltage 2 | VZ2 | 3.3 | 4 | V | IZT2 = 1 mA, PW = 1 ms | 2 | |
| Maximum Zener Impedance 2 | ZZT2 | 600 | Ω | IZT2 = 1 mA, IZ(AC) = 0.1 IZ(DC), f = 1 kHz | 2 | ||
| Max Reverse Leakage Current | IR | 3 | µA | VR = 1 V | 2 | ||
| Forward Voltage | VF | 0.9 | V | IF = 10 mA | 2 | ||
| Total Power Dissipation | PD | 500 | mW | FR-5 board, TL = 75°C | 1 | ||
| Power Derating above 75°C | 6.7 | mW/°C | Derated above 75°C | 1 | |||
| Thermal Resistance, Junction-to-Ambient | RJA | 340 | °C/W | Infrared scan method | 1 | ||
| Thermal Resistance, Junction-to-Lead | RJL | 150 | °C/W | Infrared scan method | 1 | ||
| Junction and Storage Temperature Range | TJ, Tstg | -55 | 150 | °C | 1 | ||
| Zener Voltage Tolerance | -5 | 5 | % | Standard tolerance on nominal Zener voltage | 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 |
|---|---|---|---|---|
| housing | PPA | • ESD Rating of Class 3 (> 16 kV) per Human Body Model • AEC−Q101 Qualified and PPAP Capable | 1 |
CAD (KiCad official)
- Symbol:
SZMMSZ4V3T1G - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
szmmsz4v3t1g-etched.step/szmmsz4v3t1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);szmmsz4v3t1g.step/szmmsz4v3t1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (7 pp, sha256
a405403e06bc314c, retrieved 2026-10-22, tier: manufacturer) - 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).