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.
main
SMA4747A
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).
# SMA4747A
**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.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sma4747a.step` / `sma4747a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [DOWO datasheet](docs/sma4747a-datasheet.pdf) (3 pp, sha256 `6294c6afcab237a7`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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](docs/sma4747a-datasheet.pdf)