component
SMA4747A
Public Made by Adomby adom
DOWO Zener Diodes, SMA(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
markdownSMA4747A
DOWO · Zener Diodes · SMA(DO-214AC)
SMA4747A from DOWO, 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: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | DOWO |
| 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 (nominal 20 V, suffix A = ±10%) | VZ | 19 | 20 | 21 | V | IZT = 12.5 mA (table column for SMA4747A) | 2 |
| Maximum Zener impedance | ZZT | 22 | Ω | IZT = 12.5 mA | 2 | ||
| Maximum Zener impedance (knee) | ZZK | 750 | Ω | IZK = 0.25 mA | 2 | ||
| Maximum leakage current | IR | 0.1 | uA | VR = 15.2 V | 2 | ||
| Forward voltage | VF | 1.2 | V | IF = 200 mA | 1 | ||
| Total power dissipation at TA=50°C | Ptot | 1.25 | W | TA=50°C, derate above 50°C; mounted on 5mm x 5mm Cu pad test board | 1 | ||
| Total power dissipation at TA=75°C | Ptot | 1 | W | TA=75°C | 1 | ||
| Junction temperature | TJ | -55 | 150 | °C | 1 | ||
| Storage temperature | TSTG | -55 | 150 | °C | 1 | ||
| Junction-to-lead thermal resistance per diode | RӨJL | 29 | °C/W | per diode | 1 | ||
| Junction-to-ambient thermal resistance per diode | RӨJA | 120 | °C/W | per diode, recommended PCB (5mm x 5mm Cu pad test board) | 1 | ||
| Junction-to-case thermal resistance per diode | RӨJC | 31 | °C/W | per diode | 1 |
CAD (KiCad official)
- Symbol:
SMA4747A - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
sma4747a-etched.step/sma4747a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sma4747a.step/sma4747a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: DOWO datasheet (3 pp, sha256
6294c6afcab237a7, retrieved 2026-10-22, 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).