component
S-LUDZS3.9BT1G
Public Made by Adomby adom
LRC Zener Diodes, SOD-323. 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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S-LUDZS3.9BT1G
LRC · Zener Diodes · SOD-323
S-LUDZS3.9BT1G from LRC, in a SOD-323. 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 | LRC |
| Package | SOD-323 |
| 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 | VZ | 3.89 | 4.16 | V | IZT=5mA | 1 | |
| Operating resistance | ZZT | 100 | Ω | IZT=5mA | 1 | ||
| Rising operating resistance | ZZK | 1000 | Ω | IZK=1mA | 1 | ||
| Reverse current | IR | 5 | μA | VR=1V | 1 | ||
| Total device dissipation, FR-5 board | PD | 200 | mW | TA=25ºC | 1 | ||
| Derate above 25ºC | PD | 1.57 | mW/ºC | Above 25ºC | 1 | ||
| Thermal resistance, junction-to-ambient | RΘJA | 635 | ºC/W | FR-5 board (Note 1) | 1 | ||
| Junction and storage temperature | TJ,Tstg | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
S-LUDZS3.9BT1G - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
s-ludzs3-9bt1g-etched.step/s-ludzs3-9bt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);s-ludzs3-9bt1g.step/s-ludzs3-9bt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LRC datasheet (3 pp, sha256
1954f6ea145f2549, 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).
# S-LUDZS3.9BT1G
**LRC** · Zener Diodes · SOD-323
S-LUDZS3.9BT1G from LRC, in a SOD-323. 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 | LRC |
| Package | SOD-323 |
| 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 | VZ | 3.89 | | 4.16 | V | IZT=5mA | 1 |
| Operating resistance | ZZT | | | 100 | Ω | IZT=5mA | 1 |
| Rising operating resistance | ZZK | | | 1000 | Ω | IZK=1mA | 1 |
| Reverse current | IR | | | 5 | μA | VR=1V | 1 |
| Total device dissipation, FR-5 board | PD | | | 200 | mW | TA=25ºC | 1 |
| Derate above 25ºC | PD | | | 1.57 | mW/ºC | Above 25ºC | 1 |
| Thermal resistance, junction-to-ambient | RΘJA | | | 635 | ºC/W | FR-5 board (Note 1) | 1 |
| Junction and storage temperature | TJ,Tstg | -55 | | 150 | °C | | 1 |
## CAD (KiCad official)
- Symbol: `S-LUDZS3.9BT1G`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `s-ludzs3-9bt1g-etched.step` / `s-ludzs3-9bt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `s-ludzs3-9bt1g.step` / `s-ludzs3-9bt1g.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [LRC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590184388635103232) (3 pp, sha256 `1954f6ea145f2549`, 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/s-ludzs3-9bt1g-datasheet.pdf)