component
SML4742A-E3
Public Made by Adomby adom
Vishay Intertech Zener Diodes, DO-214AC. 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
markdownSML4742A-E3
Vishay Intertech · Zener Diodes · DO-214AC
SML4742A-E3 from Vishay Intertech, in a 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: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Vishay Intertech |
| Package | 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 |
|---|---|---|---|---|---|---|---|
| Power dissipation | Ptot | 1000 | mW | TL = 75 °C | 1 | ||
| Junction temperature | Tj | 150 | °C | 1 | |||
| Storage temperature range | Tstg | -65 | 150 | °C | 1 | ||
| Zener voltage tolerance (suffix A, ±5 %) | VZ | -5 | 5 | % | Suffix A ± 5 %; standard (no suffix) is ± 10 % | 1 | |
| Zener voltage nominal | VZ | 12 | V | at IZT1 = 21 mA | 2 | ||
| Reverse current | IR | 5 | µA | at VR = 9.1 V | 2 | ||
| Dynamic resistance | ZZ | 9 | Ω | at IZT1 = 21 mA | 2 | ||
| Dynamic resistance (knee) | ZZK | 700 | Ω | at IZT2 = 0.25 mA | 2 | ||
| Surge current | IRM | 380 | mApk | non-repetitive 8.3 ms pulse width square wave or equivalent sine-wave superimposed on IZT per JEDEC method | 2 |
CAD (KiCad official)
- Symbol:
SML4742A-E3 - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC (KiCad packages3D, STEP)
- 3D model files:
sml4742a-e3-etched.step/sml4742a-e3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sml4742a-e3.step/sml4742a-e3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Vishay Intertech datasheet (5 pp, sha256
1ca973ca99dcfbf5, retrieved 2026-10-14, 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).