component
MM1Z5226B
Public Made by Adomby adom
ST Semtech 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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README
markdownMM1Z5226B
ST Semtech · Zener Diodes · SOD-123
MM1Z5226B from ST Semtech, 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 silicon planar Zener diode; the pinning table on page 1 assigns pin 1 as the cathode, and the device is rated for 500 mW total power dissipation (Ptot max.) with junction temperature up to 150 ℃. |
| 2 | Anode | passive | Anode of the Zener diode; the pinning table and top view on page 1 assign pin 2 as the anode, and forward voltage is specified as 0.9 V max. at IF = 10 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST Semtech |
| 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 (nominal Vznom 3.3 V) | VZT | 3.14 | 3.3 | 3.47 | V | at IZT 20 mA; tested with pulses (20 ms) | 2 |
| Dynamic impedance | ZZT | 28 | Ω | at IZT 20 mA | 2 | ||
| Dynamic impedance (knee) | ZZK | 1600 | Ω | at IZK 0.25 mA (column alignment unclear, see review_required) | 2 | ||
| Reverse current | IR | 25 | µA | at VR 1 V | 2 | ||
| Forward voltage | VF | 0.9 | V | at IF 10 mA | 1 | ||
| Total power dissipation | Ptot | 500 | mW | Ta = 25℃ | 1 | ||
| Junction temperature | Tj | 150 | ℃ | 1 | |||
| Storage temperature range | TStg | -55 | 150 | ℃ | 1 | ||
| Thermal resistance junction to ambient air | RθJA | 350 | ℃/W | junction to ambient air | 1 | ||
| Zener voltage tolerance | -5 | 5 | % | approximately, per Features | 1 |
CAD (KiCad official)
- Symbol:
MM1Z5226B - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mm1z5226b-etched.step/mm1z5226b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm1z5226b.step/mm1z5226b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST Semtech datasheet (4 pp, sha256
a80b873003c5c24a, retrieved 2026-10-18, 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).