component
Z1SMA20
Public Made by Adomby adom
(DIOTEC) Zener Diodes, SMA(DO-214AC). 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.
Contents
README
markdownZ1SMA20
(DIOTEC) · Zener Diodes · SMA(DO-214AC)
Z1SMA20 from (DIOTEC), in a SMA(DO-214AC). 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, marked by the white band on the package; per the datasheet it must be connected to the negative pole since the Z1SMA is operated in forward mode (Z1SMA20: Zener voltage 18.8-21.2 V at IZ = 5 mA, Ptot 1.5 W at TT = 75°C). |
| 2 | A | passive | Anode terminal of the Zener diode; the datasheet gives no separate text for it, but it is the opposite terminal to the white-band cathode (Tj max 150°C). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | (DIOTEC) |
| Package | SMA(DO-214AC) |
| 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 = 5 mA, Tj = 25°C | 2 | |
| Dynamic resistance | rzj | 20 | 50 | Ω | IZ = 5 mA, f = 1 kHz | 2 | |
| Dynamic resistance | rzj | 220 | Ω | IZ = 1 mA, f = 1 kHz | 2 | ||
| Temperature coefficient of Z-voltage | αVZ | 7 | 9 | 10-4 /°C | IZ = 5 mA | 2 | |
| Reverse voltage | VR | 15 | V | IR = 1 μA | 2 | ||
| Z-current | IZmax | 47 | mA | TA = 50°C | 2 | ||
| Power dissipation | Ptot | 1 | W | TA = 50°C, 25 mm2 copper pad per terminal | 1 | ||
| Power dissipation | Ptot | 1.5 | W | TT = 75°C, 1 in² copper pad per terminal | 1 | ||
| Operating junction temperature | Tj | -50 | 150 | °C | 1 | ||
| Storage temperature | TS | -50 | 175 | °C | 1 | ||
| Thermal resistance junction to ambient | RthA | 70 | K/W | 25 mm2 copper pad per terminal | 1 | ||
| Thermal resistance junction to terminal | RthT | 30 | 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 pad per terminal, Montage auf Leiterplatte mit 25 mm2 Kupferpad je Anschluss | 1 |
CAD (KiCad official)
- Symbol:
Z1SMA20 - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
z1sma20-etched.step/z1sma20-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);z1sma20.step/z1sma20.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: (DIOTEC) datasheet (3 pp, sha256
6f0347df148e5bd6, 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).