component
MM5Z18VT1G
Public Made by Adomby adom
onsemi Zener Diodes, SOD-523. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MM5Z18VT1G
onsemi · Zener Diodes · SOD-523
MM5Z18VT1G from onsemi, 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 terminal, identified by the polarity band on the SOD-523 package (Style 1 pin 1 per the package drawing). |
| 2 | Anode | passive | Anode terminal of the Zener diode, opposite the cathode band (Style 1 pin 2 per the package drawing). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Zener Voltage (VZ1), IZT1 = 5 mA | VZ | 16.8 | 18 | 19.1 | V | IZT1 = 5 mA; pulse test; TA = 25°C | 3 |
| Reverse Zener Voltage (VZ2), IZT2 = 1 mA | VZ | 16.7 | 19 | V | IZT2 = 1 mA; TA = 25°C | 3 | |
| Maximum Zener Impedance | ZZT | 45 | Ω | @ IZT | 3 | ||
| Maximum Zener Impedance | ZZK | 80 | Ω | @ IZK = 1.0 mA | 3 | ||
| Reverse Leakage Current | IR | 0.05 | µA | @ VR = 12.6 V | 3 | ||
| Maximum Temperature Coefficient of VZ | VZ | 12.4 | 16 | mV/k | @ IZT | 3 | |
| Max. Capacitance | C | 100 | pF | @ VR = 0, f = 1 MHz | 3 | ||
| Forward Voltage | VF | 0.9 | V | @ IF = 10 mA | 3 | ||
| Total Device Dissipation, FR-4 Board (Note 1) | PD | 500 | mW | @ TA = 25°C; FR-4 board, mounting pad 1 cm2 | 1 | ||
| Derate above 25°C | PD | 4 | mW/°C | Derate above 25°C | 1 | ||
| Thermal Resistance, Junction-to-Ambient (Note 1) | RJA | 250 | °C/W | Note 1: FR-4 board, single-sided copper, mounting pad 1 cm2 | 1 | ||
| Junction and Storage Temperature Range | TJ, Tstg | -65 | 150 | °C | 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 |
|---|---|---|---|---|
| contacts | tin | LEAD FINISH: 100% Matte Sn (Tin) MOUNTING POSITION: Any | 1 |
CAD (KiCad official)
- Symbol:
MM5Z18VT1G - Footprint:
Diode_SMD:D_SOD-523 - 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files:
mm5z18vt1g-etched.step/mm5z18vt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm5z18vt1g.step/mm5z18vt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (4 pp, sha256
eef0bcb274a92c8b, retrieved 2026-10-21, tier: manufacturer) - 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).
# MM5Z18VT1G
**onsemi** · Zener Diodes · SOD-523
MM5Z18VT1G from onsemi, 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 terminal, identified by the polarity band on the SOD-523 package (Style 1 pin 1 per the package drawing). |
| 2 | Anode | passive | Anode terminal of the Zener diode, opposite the cathode band (Style 1 pin 2 per the package drawing). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Zener Voltage (VZ1), IZT1 = 5 mA | VZ | 16.8 | 18 | 19.1 | V | IZT1 = 5 mA; pulse test; TA = 25°C | 3 |
| Reverse Zener Voltage (VZ2), IZT2 = 1 mA | VZ | 16.7 | | 19 | V | IZT2 = 1 mA; TA = 25°C | 3 |
| Maximum Zener Impedance | ZZT | | | 45 | Ω | @ IZT | 3 |
| Maximum Zener Impedance | ZZK | | | 80 | Ω | @ IZK = 1.0 mA | 3 |
| Reverse Leakage Current | IR | | | 0.05 | µA | @ VR = 12.6 V | 3 |
| Maximum Temperature Coefficient of VZ | VZ | 12.4 | | 16 | mV/k | @ IZT | 3 |
| Max. Capacitance | C | | | 100 | pF | @ VR = 0, f = 1 MHz | 3 |
| Forward Voltage | VF | | | 0.9 | V | @ IF = 10 mA | 3 |
| Total Device Dissipation, FR-4 Board (Note 1) | PD | | | 500 | mW | @ TA = 25°C; FR-4 board, mounting pad 1 cm2 | 1 |
| Derate above 25°C | PD | | | 4 | mW/°C | Derate above 25°C | 1 |
| Thermal Resistance, Junction-to-Ambient (Note 1) | RJA | | | 250 | °C/W | Note 1: FR-4 board, single-sided copper, mounting pad 1 cm2 | 1 |
| Junction and Storage Temperature Range | TJ, Tstg | -65 | | 150 | °C | | 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 |
|---|---|---|---|---|
| contacts | | tin | LEAD FINISH: 100% Matte Sn (Tin) MOUNTING POSITION: Any | 1 |
## CAD (KiCad official)
- Symbol: `MM5Z18VT1G`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `mm5z18vt1g-etched.step` / `mm5z18vt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mm5z18vt1g.step` / `mm5z18vt1g.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/mm5z18vt1-d.pdf) (4 pp, sha256 `eef0bcb274a92c8b`, retrieved 2026-10-21, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/mm5z18vt1g-datasheet.pdf)