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1N4742APF
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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1N4742APF
ST Semtech · Zener Diodes · DO-41
1N4742APF 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 tolerance (suffix A) | -5 | 5 | % | Suffix A = ±5%; standard is ±10% | 1 | ||
| Zener voltage VZT (minimum) | VZT | 11.4 | V | at IZT = 21 mA | 3 | ||
| Zener voltage VZT (maximum) | VZT | 12.6 | V | at IZT = 21 mA | 3 | ||
| Dynamic resistance ZZT (maximum) | ZZT | 9 | Ω | at IZT = 21 mA | 3 | ||
| Dynamic resistance ZZK (maximum) | ZZK | 700 | Ω | at IZK = 0.25 mA | 3 | ||
| Reverse current IR (maximum) | IR | 5 | µA | at VR = 9.1 V | 3 | ||
| Maximum surge current IZSM | IZSM | 380 | mA | Peak non-repetitive reverse surge, 1/2 square wave or sine pulse of 1/120 s, superimposed on IZT | 3 | ||
| Maximum regulator current IZM | IZM | 76 | mA | Valid provided leads at 8 mm from case are kept at ambient temperature | 3 | ||
| Temperature coefficient | 0.045 | 0.085 | %/℃ | 3 | |||
| Forward voltage VF (maximum) | VF | 1.2 | V | at IF = 200 mA | 2 | ||
| Power dissipation Ptot (maximum) | Ptot | 1 | W | Ta = 25℃; leads at 8 mm from case kept at ambient temperature | 1 | ||
| Junction temperature Tj (maximum) | Tj | 175 | ℃ | 1 | |||
| Storage temperature range Tstg | Tstg | -65 | 175 | ℃ | 1 | ||
| Thermal resistance junction to ambient RθJA (maximum) | RθJA | 150 | ℃/W | Leads at a distance of 8 mm from case kept at ambient temperature | 1 | ||
| Zener voltage VZnom (nominal) | VZnom | 12 | V | 2 |
CAD (KiCad official)
- Symbol:
1N4742APF - 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 (5 pp, sha256
dd71dcfee8108242, retrieved 2026-10-14, 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).
# 1N4742APF
**ST Semtech** · Zener Diodes · DO-41
1N4742APF 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 tolerance (suffix A) | | -5 | | 5 | % | Suffix A = ±5%; standard is ±10% | 1 |
| Zener voltage VZT (minimum) | VZT | 11.4 | | | V | at IZT = 21 mA | 3 |
| Zener voltage VZT (maximum) | VZT | | | 12.6 | V | at IZT = 21 mA | 3 |
| Dynamic resistance ZZT (maximum) | ZZT | | | 9 | Ω | at IZT = 21 mA | 3 |
| Dynamic resistance ZZK (maximum) | ZZK | | | 700 | Ω | at IZK = 0.25 mA | 3 |
| Reverse current IR (maximum) | IR | | | 5 | µA | at VR = 9.1 V | 3 |
| Maximum surge current IZSM | IZSM | | | 380 | mA | Peak non-repetitive reverse surge, 1/2 square wave or sine pulse of 1/120 s, superimposed on IZT | 3 |
| Maximum regulator current IZM | IZM | | | 76 | mA | Valid provided leads at 8 mm from case are kept at ambient temperature | 3 |
| Temperature coefficient | | 0.045 | | 0.085 | %/℃ | | 3 |
| Forward voltage VF (maximum) | VF | | | 1.2 | V | at IF = 200 mA | 2 |
| Power dissipation Ptot (maximum) | Ptot | | | 1 | W | Ta = 25℃; leads at 8 mm from case kept at ambient temperature | 1 |
| Junction temperature Tj (maximum) | Tj | | | 175 | ℃ | | 1 |
| Storage temperature range Tstg | Tstg | -65 | | 175 | ℃ | | 1 |
| Thermal resistance junction to ambient RθJA (maximum) | RθJA | | | 150 | ℃/W | Leads at a distance of 8 mm from case kept at ambient temperature | 1 |
| Zener voltage VZnom (nominal) | VZnom | | 12 | | V | | 2 |
## CAD (KiCad official)
- Symbol: `1N4742APF`
- 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/8603345249515556864) (5 pp, sha256 `dd71dcfee8108242`, retrieved 2026-10-14, 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/1n4742apf-datasheet.pdf)