component
MMSZ5V1
Public Made by Adomby adom
DOWO 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
markdownMMSZ5V1
DOWO · Zener Diodes · SOD-123
MMSZ5V1 from DOWO, 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 | K | passive | Cathode, the end marked by the color band and the '-' lead in the package drawing; this is the positive-voltage side in zener (reverse-breakdown) operation, with VZ 4.85 V min / 5.1 V nom / 5.36 V max for MMSZ5V1. |
| 2 | A | passive | Anode, the '+' lead in the package drawing opposite the color band; forward voltage is 0.9 V at IF=10 mA and power dissipation is 500 mW. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | DOWO |
| 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 | VZ1 | 4.85 | 5.1 | 5.36 | V | @IZ=IZT | 2 |
| Storage temperature range | TsTG | -65 | 150 | ℃ | 1 | ||
| Dynamic impedance | ZZT | 60 | Ω | @IZ | 2 | ||
| Dynamic impedance (knee) | ZZK | 480 | Ω | @IZK | 2 | ||
| Reverse current | IR | 2 | uA | @VR=2.0 V | 2 | ||
| Power dissipation | Pd | 500 | mW | 1 | |||
| Forward voltage | Vf | 0.9 | V | @IF=10mA | 1 | ||
| Thermal resistance from junction to ambient | RθJA | 357 | ℃/W | 1 | |||
| Junction temperature | TJ | 150 | ℃ | 1 |
CAD (KiCad official)
- Symbol:
MMSZ5V1 - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz5v1-etched.step/mmsz5v1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz5v1.step/mmsz5v1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: DOWO datasheet (3 pp, sha256
79b6069fc694e731, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).