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MM5Z22B
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ST(Semtech) Zener Diodes, SOD-523. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MM5Z22B
ST(Semtech) · Zener Diodes · SOD-523
MM5Z22B 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 Zener diode (marked with the cathode line); Zener voltage 21.54...22.47 V at IZT = 5 mA for the MM5Z22B. |
| 2 | A | passive | Anode of the Zener diode; forward voltage max. 0.9 V at IF = 10 mA. |
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 |
|---|---|---|---|---|---|---|---|
| Zener Voltage Range | VZT | 21.54 | 22.47 | V | IZT = 5 mA | 2 | |
| Dynamic Impedance | ZZT | 100 | Ω | at IZT = 5 mA | 2 | ||
| Reverse Leakage Current | IR | 0.1 | μA | at VR = 17 V | 2 | ||
| Forward Voltage | VF | 0.9 | V | IF = 10 mA | 1 | ||
| Thermal Resistance Junction to Ambient Air | RthA | 635 | ℃/W | Ta = 25 °C | 1 | ||
| Power Dissipation | Ptot | 200 | mW | Ta = 25 °C | 1 | ||
| Junction Temperature | Tj | 150 | ℃ | Ta = 25 °C | 1 | ||
| Storage Temperature Range | TStg | -55 | 150 | ℃ | Ta = 25 °C | 1 |
CAD (KiCad official)
- Symbol:
MM5Z22B - Footprint:
Diode_SMD:D_SOD-523 - 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files:
mm5z22b-etched.step/mm5z22b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm5z22b.step/mm5z22b.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 2026-10-22, 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).
# MM5Z22B
**ST(Semtech)** · Zener Diodes · SOD-523
MM5Z22B 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 Zener diode (marked with the cathode line); Zener voltage 21.54...22.47 V at IZT = 5 mA for the MM5Z22B. |
| 2 | A | passive | Anode of the Zener diode; forward voltage max. 0.9 V at IF = 10 mA. |
## 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 |
|---|---|---|---|---|---|---|---|
| Zener Voltage Range | VZT | 21.54 | | 22.47 | V | IZT = 5 mA | 2 |
| Dynamic Impedance | ZZT | | | 100 | Ω | at IZT = 5 mA | 2 |
| Reverse Leakage Current | IR | | | 0.1 | μA | at VR = 17 V | 2 |
| Forward Voltage | VF | | | 0.9 | V | IF = 10 mA | 1 |
| Thermal Resistance Junction to Ambient Air | RthA | | | 635 | ℃/W | Ta = 25 °C | 1 |
| Power Dissipation | Ptot | | | 200 | mW | Ta = 25 °C | 1 |
| Junction Temperature | Tj | | | 150 | ℃ | Ta = 25 °C | 1 |
| Storage Temperature Range | TStg | -55 | | 150 | ℃ | Ta = 25 °C | 1 |
## CAD (KiCad official)
- Symbol: `MM5Z22B`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `mm5z22b-etched.step` / `mm5z22b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mm5z22b.step` / `mm5z22b.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [ST(Semtech) datasheet](docs/mm5z22b-datasheet.pdf) (3 pp, sha256 `5acd252c61e6c21f`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/mm5z22b-datasheet.pdf)