component
MM3Z27B
Public Made by Adomby adom
ST Semtech Zener Diodes, SOD-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 4d ago |
| viewers | 4d ago |
| mm3z27b-etched.glb | 4d ago |
| mm3z27b-etched.step | 4d ago |
| mm3z27b-hero.glb | 4d ago |
| mm3z27b-hero.overlay.json | 4d ago |
| mm3z27b.glb | 4d ago |
| mm3z27b.kicad_mod | 4d ago |
| mm3z27b.kicad_sym | 4d ago |
| mm3z27b.lbr | 4d ago |
| mm3z27b.step | 4d ago |
| package.json | 4d ago |
| page.json | 4d ago |
| README.md | 4d ago |
MM3Z27B
ST Semtech · Zener Diodes · SOD-323
MM3Z27B from ST Semtech, 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 (marked by the cathode line); MM3Z27B has VZ of 26.19 V to 27.53 V at IZT = 5 mA. |
| 2 | Anode | passive | Anode of the Zener diode; total power dissipation is limited to 300 mW max. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST Semtech |
| 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 | VZT | 26.19 | 27.53 | V | IZT = 5 mA, Ta = 25℃, pulsed 20 ms | 2 | |
| Dynamic Impedance | ZZT | 150 | Ω | at IZT = 5 mA | 2 | ||
| Reverse Leakage Current | IR | 0.1 | μA | VR = 21 V | 2 | ||
| Forward Voltage | VF | 0.9 | V | IF = 10 mA | 2 | ||
| Power Dissipation | Ptot | 300 | mW | Ta = 25℃ | 1 | ||
| Junction Temperature | Tj | 150 | ℃ | Ta = 25℃ | 1 | ||
| Storage Temperature Range | TStg | -55 | 150 | ℃ | Ta = 25℃ | 1 | |
| Thermal Resistance Junction to Ambient Air | RthA | 417 | ℃/W | Device mounted on FR-4 PC board, 2oz copper, minimum recommended pad layout | 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 |
|---|---|---|---|---|
| housing | Abs | plastic SMD SOD-323 package Absolute Maximum Ratings (Ta = 25℃) | 1 |
CAD (KiCad official)
- Symbol:
MM3Z27B - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
mm3z27b-etched.step/mm3z27b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm3z27b.step/mm3z27b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST Semtech datasheet (4 pp, sha256
e3d2ccefaaf4a468, 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).