component
TCMM5Z18V
Public Made by Adomby adom
Tak Cheong Zener Diodes, SOD-523. 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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README
markdownTCMM5Z18V
Tak Cheong · Zener Diodes · SOD-523
TCMM5Z18V from Tak Cheong, 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 | 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-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 (min / nom / max) | VZ | 16.8 | 18 | 19.1 | V | @ IZT = 5 mA; pulse 10 ms (Note 1) | 2 |
| Zener impedance | ZZT | 45 | Ω | @ IZT = 5 mA | 2 | ||
| Zener impedance at knee | ZZK | 80 | Ω | @ IZK = 1 mA | 2 | ||
| Reverse leakage current | IR | 0.05 | μA | @ VR = 12.6 V | 2 | ||
| Forward voltage | VF | 1 | V | @ IF = 10 mA | 2 | ||
| Power dissipation | PD | 200 | mW | TA = 25°C | 1 | ||
| Storage temperature range | TSTG | -55 | 150 | °C | 1 | ||
| Operating temperature range | TOPR | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
TCMM5Z18V - Footprint:
Diode_SMD:D_SOD-523 - 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files:
tcmm5z18v-etched.step/tcmm5z18v-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tcmm5z18v.step/tcmm5z18v.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Tak Cheong datasheet (5 pp, sha256
e8cd27777a272e97, retrieved 2026-10-15, 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).