component
1N4742A
Public Made by Adomby adom
onsemi 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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1N4742A
onsemi · Zener Diodes · DO-41
1N4742A from onsemi, 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 | onsemi |
| 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 | VZ | 11.4 | 12 | 12.6 | V | IZ = 21 mA, TL = 30°C, 3/8" lead length | 2 |
| Max. Zener Impedance | ZZ | 9 | Ω | @ IZ = 21 mA | 2 | ||
| Max. Zener Knee Impedance | ZZK | 700 | Ω | @ IZK = 0.25 mA | 2 | ||
| Leakage Current | IR | 5 | µA | VR = 9.1 V | 2 | ||
| Non-Repetitive Peak Reverse Current | IZSM | 380 | mA | Square wave reverse surge at 8.3 msec soak time | 2 | ||
| Power Dissipation | PD | 1 | W | @ TL ≤ 50°C, Lead Length = 3/8" | 2 | ||
| Power Derating above 50°C | 6.67 | mW/°C | Derate above 50°C | 2 | |||
| Operating and Storage Temperature Range | TJ, TSTG | -65 | 200 | °C | 2 | ||
| Zener Voltage Tolerance | -5 | 5 | % | Tolerance = 5% | 2 | ||
| Test Current | IZ | 21 | mA | Test current for VZ | 2 | ||
| Leakage Knee Test Current | IZK | 0.25 | mA | Test current for ZZK | 2 |
CAD (KiCad official)
- Symbol:
1N4742A - 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: onsemi datasheet (6 pp, sha256
919858dd20e933ff, retrieved 2026-10-22, tier: manufacturer) - 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).
# 1N4742A
**onsemi** · Zener Diodes · DO-41
1N4742A from onsemi, 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 | onsemi |
| 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 | VZ | 11.4 | 12 | 12.6 | V | IZ = 21 mA, TL = 30°C, 3/8" lead length | 2 |
| Max. Zener Impedance | ZZ | | | 9 | Ω | @ IZ = 21 mA | 2 |
| Max. Zener Knee Impedance | ZZK | | | 700 | Ω | @ IZK = 0.25 mA | 2 |
| Leakage Current | IR | | | 5 | µA | VR = 9.1 V | 2 |
| Non-Repetitive Peak Reverse Current | IZSM | | | 380 | mA | Square wave reverse surge at 8.3 msec soak time | 2 |
| Power Dissipation | PD | | | 1 | W | @ TL ≤ 50°C, Lead Length = 3/8" | 2 |
| Power Derating above 50°C | | | | 6.67 | mW/°C | Derate above 50°C | 2 |
| Operating and Storage Temperature Range | TJ, TSTG | -65 | | 200 | °C | | 2 |
| Zener Voltage Tolerance | | -5 | | 5 | % | Tolerance = 5% | 2 |
| Test Current | IZ | | 21 | | mA | Test current for VZ | 2 |
| Leakage Knee Test Current | IZK | | 0.25 | | mA | Test current for ZZK | 2 |
## CAD (KiCad official)
- Symbol: `1N4742A`
- 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:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/1n4742a-d.pdf) (6 pp, sha256 `919858dd20e933ff`, retrieved 2026-10-22, tier: manufacturer)
- **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/1n4742a-datasheet.pdf)