component
ZMY20
Public Made by Adomby adom
(DIOTEC) Zener Diodes, DO-213AB. Pinout cross-checked by two models against the datasheet, 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
markdownZMY20
(DIOTEC) · Zener Diodes · DO-213AB
ZMY20 from (DIOTEC), in a DO-213AB. 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 of the Zener diode, marked by the white cathode mark on the plastic MELF body, connected to the positive side in reverse (Zener) operation. |
| 2 | A | passive | Anode of the Zener diode (opposite MELF end terminal from the cathode mark) for the 18.8 V to 21.2 V ZMY20 at IZtest = 25 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | (DIOTEC) |
| Package | DO-213AB |
| 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 | 18.8 | 21.2 | V | IZ = IZtest, tested with pulses | 2 | |
| Test current | IZtest | 25 | mA | 2 | |||
| Dynamic resistance | rzj | 6 | 15 | Ω | IZtest, f = 1 kHz | 2 | |
| Temperature coefficient of Z-voltage | αVZ | 6 | 11 | 10-4 /°C | 2 | ||
| Reverse voltage | VR | 10 | V | IR = 1 μA | 2 | ||
| Z-current | IZmax | 61 | mA | TA = 50°C | 2 | ||
| Power dissipation | Ptot | 1.3 | W | TA = 50°C, mounted on PC board with 50 mm2 copper pads per terminal | 1 | ||
| Non repetitive peak pulse power | PZSM | 40 | W | t < 1 ms, TA = 25°C | 1 | ||
| Operating junction temperature | Tj | -50 | 150 | °C | 1 | ||
| Storage temperature | TS | -50 | 175 | °C | 1 | ||
| Thermal resistance junction-ambient | RthA | 45 | K/W | Mounted on PC board with 50 mm2 copper pads per terminal | 1 | ||
| Thermal resistance junction-terminal | RthT | 10 | K/W | 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 | copper | copper pads per terminal, Montage auf Leiterplatte mit 50 mm2 | 1 |
CAD (KiCad official)
- Symbol:
ZMY20 - Footprint:
Diode_SMD:D_MELF - 3D model: DO-213AB (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: (DIOTEC) datasheet (3 pp, sha256
34a8d7104df4c7b8, 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).