component
MMSZ18VCW
Public Made by Adomby adom
YONGYUTAI Zener Diodes, SOD-123. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownMMSZ18VCW
YONGYUTAI · Zener Diodes · SOD-123
MMSZ18VCW from YONGYUTAI, 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 with the color band; the MMSZ18VCW Zener voltage is 18 V nominal (16.8 V to 19.1 V) at 5 mA, and power dissipation is 500 mW. |
| 2 | A | passive | Anode, the end opposite the color band; forward voltage is 0.9 V at IF=10 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | YONGYUTAI |
| 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 | Vz | 16.8 | 18 | 19.1 | V | @Izt = 5 mA | 2 |
| Maximum Zener Impedance | Zzt | 45 | Ω | @Izt = 5 mA | 2 | ||
| Maximum Zener Impedance (knee) | Zzk | 225 | Ω | @Izk = 1.0 mA | 2 | ||
| Maximum Reverse Current | IR | 0.1 | uA | VR = 12.6 V | 2 | ||
| Typical Temperature Coefficient | 12.4 | 16 | mV/℃ | IZTC = 5 mA | 2 | ||
| Power Dissipation | Pd | 500 | mW | TA = 25℃ | 1 | ||
| Storage temperature range | Ts | -65 | 150 | ℃ | 1 | ||
| Thermal resistance junction to ambient | RthA | 400 | K/W | Device mounted on ceramic PCB 7.6mm x 9.4mm x 0.87mm with pad areas 25mm² | 1 | ||
| Forward Voltage | Vf | 0.9 | V | IF = 10 mA | 1 | ||
| Nominal Zener Voltage Test Current | Izt | 5 | mA | Test current for Vz | 2 |
CAD (KiCad official)
- Symbol:
MMSZ18VCW - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz18vcw-etched.step/mmsz18vcw-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz18vcw.step/mmsz18vcw.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: YONGYUTAI datasheet (5 pp, sha256
6a03accc35d17660, 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).