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.
main
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"title": "Z1SMA20",
"brief": "(DIOTEC) Zener Diodes, SMA(DO-214AC). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"subcategory": "Zener Diodes",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a755258b8cc70e0d213131f3a8a3fefc.pdf",
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"checked_at": "2026-10-22T21:27:56Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "quota"
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"mouser": {
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"pins": [
{
"number": "1",
"name": "K",
"type": "passive",
"description": "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)."
},
{
"number": "2",
"name": "A",
"type": "passive",
"description": "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)."
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"guards": "pin_guards 0.1: passed",
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"at": "2026-10-22T21:27:44"
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"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
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"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
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"zmin_mm": 0,
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"sha256": "1cfddd4e3b1bf22b8fc6ee3258c2aade882ed7b85b528e23b9db42437775a1db",
"checked": "2026-10-22",
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"seat": "z = 0",
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}
]
},
"metadata": {
"specs": {
"Manufacturer": "(DIOTEC)",
"Package": "SMA(DO-214AC)",
"Category": "Diodes",
"Pins": "2"
},
"appearance": {
"contacts": {
"quote": "copper pad per terminal – Montage auf Leiterplatte mit 25 mm2 Kupferpad je Anschluss",
"page": 1,
"doc": "ds.pdf",
"material": "copper"
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"version": 1,
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"rows": [
{
"name": "Zener voltage",
"symbol": "VZ",
"kind": "electrical",
"unit": "V",
"min": 18.8,
"typ": null,
"max": 21.2,
"conditions": "IZ = 5 mA, Tj = 25°C",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Dynamic resistance",
"symbol": "rzj",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 20,
"max": 50,
"conditions": "IZ = 5 mA, f = 1 kHz",
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{
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"min": null,
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"max": 220,
"conditions": "IZ = 1 mA, f = 1 kHz",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Temperature coefficient of Z-voltage",
"symbol": "αVZ",
"kind": "temperature_coefficient",
"unit": "10-4 /°C",
"min": 7,
"typ": null,
"max": 9,
"conditions": "IZ = 5 mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Reverse voltage",
"symbol": "VR",
"kind": "electrical",
"unit": "V",
"min": 15,
"typ": null,
"max": null,
"conditions": "IR = 1 μA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Z-current",
"symbol": "IZmax",
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"unit": "mA",
"min": null,
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"max": 47,
"conditions": "TA = 50°C",
"source_page": 2,
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},
{
"name": "Power dissipation",
"symbol": "Ptot",
"kind": "absolute_maximum",
"unit": "W",
"min": null,
"typ": null,
"max": 1,
"conditions": "TA = 50°C, 25 mm2 copper pad per terminal",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Power dissipation",
"symbol": "Ptot",
"kind": "absolute_maximum",
"unit": "W",
"min": null,
"typ": null,
"max": 1.5,
"conditions": "TT = 75°C, 1 in² copper pad per terminal",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Operating junction temperature",
"symbol": "Tj",
"kind": "absolute_maximum",
"unit": "°C",
"min": -50,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
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{
"name": "Storage temperature",
"symbol": "TS",
"kind": "absolute_maximum",
"unit": "°C",
"min": -50,
"typ": null,
"max": 175,
"conditions": "",
"source_page": 1,
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},
{
"name": "Thermal resistance junction to ambient",
"symbol": "RthA",
"kind": "thermal",
"unit": "K/W",
"min": null,
"typ": null,
"max": 70,
"conditions": "25 mm2 copper pad per terminal",
"source_page": 1,
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{
"name": "Thermal resistance junction to terminal",
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"kind": "thermal",
"unit": "K/W",
"min": null,
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"max": 30,
"conditions": "",
"source_page": 1,
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"email": "[email protected]"
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