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1N4735A
Public Made by Adomby adom
ST Semtech Zener Diodes, DO-41. 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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1N4735A
ST Semtech · Zener Diodes · DO-41
1N4735A from ST Semtech, in a DO-41. 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 | ST Semtech |
| Package | DO-41 |
| 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 6.2 V, range 5.89 to 6.51 V) | VZ | 5.89 | 6.2 | 6.51 | V | at IZT = 41 mA | 2 |
| Maximum zener impedance | rZJT | 2 | Ω | at IZT = 41 mA | 2 | ||
| Maximum zener impedance | rZJK | 700 | Ω | at IZK = 1 mA | 2 | ||
| Maximum reverse leakage current | IR | 10 | µA | at VR = 3 V | 2 | ||
| Maximum surge current | IZSM | 730 | mA | maximum peak non-repetitive reverse surge current, 1/2 square wave, superimposed on IZT | 2 | ||
| Maximum regulator current | IZM | 146 | mA | 2 | |||
| Forward voltage | VF | 1.2 | V | at IF = 200 mA | 1 | ||
| Power dissipation | Ptot | 1 | W | valid provided leads at 8 mm from case are kept at ambient temperature | 1 | ||
| Junction temperature | Tj | 200 | °C | 1 | |||
| Storage temperature range | TS | -65 | 200 | °C | 1 | ||
| Thermal resistance junction to ambient air | RthA | 170 | K/W | leads at 8 mm from case kept at ambient temperature | 1 |
CAD (KiCad official)
- Symbol:
1N4735A - Footprint:
Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal - 3D model: DO-41 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST Semtech datasheet (4 pp, sha256
b4504508e5b23338, retrieved 2026-10-16, 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).
# 1N4735A
**ST Semtech** · Zener Diodes · DO-41
1N4735A from ST Semtech, in a DO-41. 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 | ST Semtech |
| Package | DO-41 |
| 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 6.2 V, range 5.89 to 6.51 V) | VZ | 5.89 | 6.2 | 6.51 | V | at IZT = 41 mA | 2 |
| Maximum zener impedance | rZJT | | | 2 | Ω | at IZT = 41 mA | 2 |
| Maximum zener impedance | rZJK | | | 700 | Ω | at IZK = 1 mA | 2 |
| Maximum reverse leakage current | IR | | | 10 | µA | at VR = 3 V | 2 |
| Maximum surge current | IZSM | | | 730 | mA | maximum peak non-repetitive reverse surge current, 1/2 square wave, superimposed on IZT | 2 |
| Maximum regulator current | IZM | | | 146 | mA | | 2 |
| Forward voltage | VF | | | 1.2 | V | at IF = 200 mA | 1 |
| Power dissipation | Ptot | | | 1 | W | valid provided leads at 8 mm from case are kept at ambient temperature | 1 |
| Junction temperature | Tj | | | 200 | °C | | 1 |
| Storage temperature range | TS | -65 | | 200 | °C | | 1 |
| Thermal resistance junction to ambient air | RthA | | | 170 | K/W | leads at 8 mm from case kept at ambient temperature | 1 |
## CAD (KiCad official)
- Symbol: `1N4735A`
- Footprint: `Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal`
- 3D model: DO-41 (KiCad packages3D, STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [ST Semtech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588887198590504960) (4 pp, sha256 `b4504508e5b23338`, retrieved 2026-10-16, 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/1n4735a-datasheet.pdf)