component
MMSZ39VBW
Public Made by Adomby adom
Tak Cheong Zener Diodes, SOD-123. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, 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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Contents
README
markdownMMSZ39VBW
Tak Cheong · Zener Diodes · SOD-123
MMSZ39VBW from Tak Cheong, 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 banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Tak Cheong |
| 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 (Min) | VZ | 38.22 | 39 | 39.78 | V | @ IZT = 2 mA | 2 |
| Nominal zener voltage tolerance | -2 | 2 | % | B series, standard tolerance on nominal zener voltage (Note 2) | 2 | ||
| Forward voltage | VF | 900 | mV | @ IF = 10 mA, all types | 2 | ||
| Zener impedance | ZZT | 130 | Ω | @ IZT = 2 mA | 2 | ||
| Zener impedance | ZZK | 329 | Ω | @ IZK = 0.5 mA | 2 | ||
| Reverse leakage current | IR | 0.045 | μA | @ VR = 27.3 V | 2 | ||
| Power Dissipation | PD | 500 | mW | TA = 25°C | 1 | ||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 1 | ||
| Operating Temperature Range | TOPR | -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 | Matte Tin(Sn) Lead Finish Band Indicates Cathode | 1 |
CAD (KiCad official)
- Symbol:
MMSZ39VBW - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz39vbw-etched.step/mmsz39vbw-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz39vbw.step/mmsz39vbw.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Tak Cheong datasheet (5 pp, sha256
b0dca992924644ff, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).