component
MM1Z5232B
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
markdownMM1Z5232B
ST Semtech · Zener Diodes · SOD-123
MM1Z5232B 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 Zener diode, marked on the package by the cathode line ("III" in the marking information); the PINNING table lists pin 1 as Cathode. |
| 2 | Anode | passive | Anode of the Zener diode, the opposite terminal to the cathode in the SOD-123 two-lead package. |
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, minimum at IZT | VZT | 5.32 | V | IZT = 20 mA, pulsed (20 ms) | 2 | ||
| Zener voltage, maximum at IZT | VZT | 5.88 | V | IZT = 20 mA, pulsed (20 ms) | 2 | ||
| Nominal zener voltage | Vznom | 5.6 | V | 2 | |||
| Zener dynamic impedance, maximum at IZT | ZZT | 11 | Ω | IZT = 20 mA; AC test IZ(AC) = 0.1 IZ(DC), f = 1 kHz | 2 | ||
| Zener dynamic impedance knee, maximum at IZK | ZZK | 1600 | Ω | IZK = 0.25 mA; AC test IZ(AC) = 0.1 IZ(DC), f = 1 kHz | 2 | ||
| Reverse current, maximum | IR | 5 | µA | VR = 3 V | 2 | ||
| Forward voltage, maximum | VF | 0.9 | V | IF = 10 mA | 1 | ||
| Power dissipation | Ptot | 500 | mW | TL = 75℃, FR-4 PCB 89 × 38 mm | 1 | ||
| Junction temperature | Tj | 150 | ℃ | 1 | |||
| Storage temperature range | Tstg | -55 | 150 | ℃ | 1 | ||
| Thermal resistance, junction to ambient | RθJA | 340 | ℃/W | Mounted on FR-4 PCB 38 × 38 × 1.6 mm, single-sided Cu pad 25 mm² | 1 | ||
| Thermal resistance, junction to lead | RθJL | 150 | ℃/W | Mounted on FR-4 PCB 38 × 38 × 1.6 mm, single-sided Cu pad 25 mm² | 1 |
CAD (KiCad official)
- Symbol:
MM1Z5232B - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mm1z5232b-etched.step/mm1z5232b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm1z5232b.step/mm1z5232b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST Semtech datasheet (4 pp, sha256
c250432c5ac03858, retrieved 2026-10-17, 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).