component
MM5Z3V9B
Public Made by Adomby adom
ST Semtech Zener Diodes, SOD-523. 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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README
markdownMM5Z3V9B
ST Semtech · Zener Diodes · SOD-523
MM5Z3V9B from ST Semtech, in a SOD-523. 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 planar Zener diode; the cathode is identified by the cathode line in the SOD-523 marking. |
| 2 | Anode | passive | Anode of the planar Zener diode in the 2-lead SOD-523 surface-mount package. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST Semtech |
| Package | SOD-523 |
| 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 |
|---|---|---|---|---|---|---|---|
| Power Dissipation | Ptot | 200 | mW | Absolute Maximum Ratings, Ta = 25 OC | 1 | ||
| Junction Temperature | Tj | 150 | ℃ | Absolute Maximum Ratings, Ta = 25 OC | 1 | ||
| Storage Temperature Range | TStg | -55 | 150 | ℃ | Absolute Maximum Ratings, Ta = 25 OC | 1 | |
| Thermal Resistance Junction to Ambient Air | RthA | 635 | ℃/W | 1 | |||
| Forward Voltage | VF | 0.9 | V | at IF = 10 mA | 1 | ||
| Zener Voltage Range (MM5Z3V9B) | VZT | 3.89 | 4.16 | V | at lZT = 5 mA; VZ tested with pulses (20 ms) | 2 | |
| Dynamic Impedance (MM5Z3V9B) | ZZT | 100 | Ω | at lZT = 5 mA; measured with very small AC current signal | 2 | ||
| Reverse Leakage Current (MM5Z3V9B) | IR | 5 | μA | at VR = 1 V | 2 |
CAD (KiCad official)
- Symbol:
MM5Z3V9B - Footprint:
Diode_SMD:D_SOD-523 - 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files:
mm5z3v9b-etched.step/mm5z3v9b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm5z3v9b.step/mm5z3v9b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST Semtech datasheet (3 pp, sha256
5acd252c61e6c21f, retrieved 2026-10-15, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).