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Z1SMA20

Public Made by Adom

by adom

(DIOTEC) Zener Diodes, SMA(DO-214AC). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Z1SMA20

(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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); z1sma20.step / z1sma20.glb are 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, primary claude-sonnet-5-5 (text), consensus claude-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).

Datasheet PDF