component
SMA3Z18A
Public Made by Adomby adom
ZHIDE Zener Diodes, SMA. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
main
SMA3Z18A
ZHIDE · Zener Diodes · SMA
SMA3Z18A from ZHIDE, in a 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 | ZHIDE |
| Package | 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 AVE) | VZ | 17.1 | 18 | 18.9 | V | @IZT 42.0 mA (per table column) | 3 |
| Junction and storage temperature range | TJ, TSTG | -55 | 150 | ℃ | 1 | ||
| DC power dissipation at TL = 75 °C | PD | 3 | W | TL = 75 °C (lead temperature at 3/8'' (9.5 mm) from body) | 1 | ||
| Maximum forward voltage | VF | 1.2 | V | if=200mA | 1 | ||
| Maximum zener impedance (ZZT) | ZZT | 6 | Ω | @IZT 42.0 mA | 3 | ||
| Maximum zener impedance at knee (ZZK) | ZZK | 750 | Ω | @IZK 0.25 mA | 3 | ||
| Maximum reverse leakage current (IR) | IR | 0.5 | uA | @VR 13.7 V | 3 | ||
| Maximum DC zener current | IZM | 150 | mA | 3 |
CAD (KiCad official)
- Symbol:
SMA3Z18A - Footprint:
Diode_SMD:D_SMA - 3D model: SMA (KiCad packages3D, STEP)
- 3D model files:
sma3z18a-etched.step/sma3z18a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sma3z18a.step/sma3z18a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ZHIDE datasheet (3 pp, sha256
59b9f967a08f245f, retrieved 2026-10-15, 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).
# SMA3Z18A
**ZHIDE** · Zener Diodes · SMA
SMA3Z18A from ZHIDE, in a 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 | ZHIDE |
| Package | 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 AVE) | VZ | 17.1 | 18 | 18.9 | V | @IZT 42.0 mA (per table column) | 3 |
| Junction and storage temperature range | TJ, TSTG | -55 | | 150 | ℃ | | 1 |
| DC power dissipation at TL = 75 °C | PD | | | 3 | W | TL = 75 °C (lead temperature at 3/8'' (9.5 mm) from body) | 1 |
| Maximum forward voltage | VF | | | 1.2 | V | if=200mA | 1 |
| Maximum zener impedance (ZZT) | ZZT | | | 6 | Ω | @IZT 42.0 mA | 3 |
| Maximum zener impedance at knee (ZZK) | ZZK | | | 750 | Ω | @IZK 0.25 mA | 3 |
| Maximum reverse leakage current (IR) | IR | | | 0.5 | uA | @VR 13.7 V | 3 |
| Maximum DC zener current | IZM | | | 150 | mA | | 3 |
## CAD (KiCad official)
- Symbol: `SMA3Z18A`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA (KiCad packages3D, STEP)
- 3D model files: `sma3z18a-etched.step` / `sma3z18a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sma3z18a.step` / `sma3z18a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [ZHIDE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603062216903958528) (3 pp, sha256 `59b9f967a08f245f`, retrieved 2026-10-15, 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/sma3z18a-datasheet.pdf)