component
1N4737APF
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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1N4737APF
ST Semtech · Zener Diodes · DO-41
1N4737APF 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, minimum | VZT | 7.13 | V | at IZT = 34 mA | 3 | ||
| Zener voltage, maximum | VZT | 7.88 | V | at IZT = 34 mA | 3 | ||
| Dynamic resistance, maximum | ZZT | 4 | Ω | at IZT = 34 mA | 3 | ||
| Dynamic resistance, maximum | ZZK | 700 | Ω | at IZK = 0.5 mA | 3 | ||
| Reverse current, maximum | IR | 10 | µA | at VR = 5 V | 3 | ||
| Maximum surge current | IZSM | 605 | mA | 1/2 square wave or sine pulse of 1/120 s superimposed on IZT (footnote 4) | 3 | ||
| Maximum regulator current | IZM | 121 | mA | leads at 8 mm from case kept at ambient temperature (footnote 2) | 3 | ||
| Temperature coefficient | 0.02 | 0.065 | %/℃ | 3 | |||
| Zener voltage tolerance (suffix A) | -5 | 5 | % | Zener voltage, suffix A = ±5% | 1 | ||
| Forward voltage, maximum | VF | 1.2 | V | at IF = 200 mA | 3 | ||
| Zener voltage, nominal | VZnom | 7.5 | V | 3 | |||
| Power dissipation | Ptot | 1 | W | Ta = 25 ℃; leads at 8 mm from case kept at ambient temperature (footnote 1) | 1 | ||
| Junction temperature | Tj | 175 | ℃ | 1 | |||
| Storage temperature range | Tstg | -65 | 175 | ℃ | 1 | ||
| Thermal resistance, junction to ambient air | RθJA | 150 | ℃/W | leads at 8 mm from case kept at ambient temperature (footnote 1) | 1 |
CAD (KiCad official)
- Symbol:
1N4737APF - 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 2026-10-15, 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).
# 1N4737APF
**ST Semtech** · Zener Diodes · DO-41
1N4737APF 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, minimum | VZT | 7.13 | | | V | at IZT = 34 mA | 3 |
| Zener voltage, maximum | VZT | | | 7.88 | V | at IZT = 34 mA | 3 |
| Dynamic resistance, maximum | ZZT | | | 4 | Ω | at IZT = 34 mA | 3 |
| Dynamic resistance, maximum | ZZK | | | 700 | Ω | at IZK = 0.5 mA | 3 |
| Reverse current, maximum | IR | | | 10 | µA | at VR = 5 V | 3 |
| Maximum surge current | IZSM | | | 605 | mA | 1/2 square wave or sine pulse of 1/120 s superimposed on IZT (footnote 4) | 3 |
| Maximum regulator current | IZM | | | 121 | mA | leads at 8 mm from case kept at ambient temperature (footnote 2) | 3 |
| Temperature coefficient | | 0.02 | | 0.065 | %/℃ | | 3 |
| Zener voltage tolerance (suffix A) | | -5 | | 5 | % | Zener voltage, suffix A = ±5% | 1 |
| Forward voltage, maximum | VF | | | 1.2 | V | at IF = 200 mA | 3 |
| Zener voltage, nominal | VZnom | | 7.5 | | V | | 3 |
| Power dissipation | Ptot | | | 1 | W | Ta = 25 ℃; leads at 8 mm from case kept at ambient temperature (footnote 1) | 1 |
| Junction temperature | Tj | | | 175 | ℃ | | 1 |
| Storage temperature range | Tstg | -65 | | 175 | ℃ | | 1 |
| Thermal resistance, junction to ambient air | RθJA | | | 150 | ℃/W | leads at 8 mm from case kept at ambient temperature (footnote 1) | 1 |
## CAD (KiCad official)
- Symbol: `1N4737APF`
- 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/8603345248647335936) (5 pp, sha256 `dd71dcfee8108242`, 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/1n4737apf-datasheet.pdf)