component
1SMA4731A
Public Made by Adomby adom
LGE Zener Diodes, DO-214AC(SMA). Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
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1SMA4731A
LGE · Zener Diodes · DO-214AC(SMA)
1SMA4731A from LGE, in a DO-214AC(SMA). 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 | LGE |
| Package | DO-214AC(SMA) |
| 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) | VZ | 4.1 | 4.3 | 4.5 | V | VZ @ IZT = 58.0 mA | 2 |
| Zener voltage tolerance (suffix A) | -5 | 5 | % | Suffix A indicates ±5.0% tolerance | 2 | ||
| Maximum Zener impedance | ZZT | 9 | Ω | @ IZT = 58.0 mA | 2 | ||
| Maximum Zener impedance | ZZK | 400 | Ω | @ IZK = 1.00 mA | 2 | ||
| Maximum leakage current | IR | 10 | uA | @ VR = 1.0 V | 2 | ||
| Forward voltage | VF | 1.2 | V | IF = 200 mA (for all types) | 2 | ||
| Peak power dissipation | PD | 1 | W | TA = 50°C (Note 1) | 1 | ||
| Power derating above 50°C | 6.67 | mW/°C | Derate above 50°C (Note 1) | 1 | |||
| Operating and storage temperature range | TJ, TSTG | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
1SMA4731A - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files:
1sma4731a-etched.step/1sma4731a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma4731a.step/1sma4731a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LGE datasheet (4 pp, sha256
0412bb4629e826db, retrieved 2026-10-21, 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).
# 1SMA4731A
**LGE** · Zener Diodes · DO-214AC(SMA)
1SMA4731A from LGE, in a DO-214AC(SMA). 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 | LGE |
| Package | DO-214AC(SMA) |
| 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) | VZ | 4.1 | 4.3 | 4.5 | V | VZ @ IZT = 58.0 mA | 2 |
| Zener voltage tolerance (suffix A) | | -5 | | 5 | % | Suffix A indicates ±5.0% tolerance | 2 |
| Maximum Zener impedance | ZZT | | | 9 | Ω | @ IZT = 58.0 mA | 2 |
| Maximum Zener impedance | ZZK | | | 400 | Ω | @ IZK = 1.00 mA | 2 |
| Maximum leakage current | IR | | | 10 | uA | @ VR = 1.0 V | 2 |
| Forward voltage | VF | | | 1.2 | V | IF = 200 mA (for all types) | 2 |
| Peak power dissipation | PD | | | 1 | W | TA = 50°C (Note 1) | 1 |
| Power derating above 50°C | | | 6.67 | | mW/°C | Derate above 50°C (Note 1) | 1 |
| Operating and storage temperature range | TJ, TSTG | -55 | | 150 | °C | | 1 |
## CAD (KiCad official)
- Symbol: `1SMA4731A`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files: `1sma4731a-etched.step` / `1sma4731a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1sma4731a.step` / `1sma4731a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [LGE datasheet](docs/1sma4731a-datasheet.pdf) (4 pp, sha256 `0412bb4629e826db`, retrieved 2026-10-21, 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/1sma4731a-datasheet.pdf)