component
1N4744A
Public Made by Adomby adom
onsemi Zener Diodes, DO-41. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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1N4744A
onsemi · Zener Diodes · DO-41
1N4744A 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 | Cathode | passive | Cathode, identified by the color band on the DO-41 glass case; the zener voltage VZ for 1N4744A is 15 V typ (14.25 V min, 15.75 V max) at IZ = 17 mA. |
| 2 | A | passive | Anode terminal at the end of the DO-41 glass case opposite the cathode color band; the datasheet gives no further pin detail. |
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 | 14.25 | 15 | 15.75 | V | IZ = 17 mA, TL = 30°C ± 1°C, 3/8" lead length | 2 |
| Max. Zener Impedance | ZZ | 14 | Ω | @ IZ = 17 mA | 2 | ||
| Max. Zener Knee Impedance | ZZK | 700 | Ω | @ IZK = 0.25 mA | 2 | ||
| Leakage Current | IR | 5 | µA | VR = 11.4 V | 2 | ||
| Non-Repetitive Peak Reverse Current | IZSM | 304 | mA | Square wave reverse surge at 8.3 msec soak time | 2 | ||
| Power Dissipation | PD | 1 | W | @ TL ≤ 50°C, Lead Length = 3/8" | 1 | ||
| Power Dissipation Derating | 6.67 | mW/°C | Derate above 50°C | 1 | |||
| Operating and Storage Temperature Range | TJ, TSTG | -65 | 200 | °C | 1 | ||
| Zener Test Current | IZ | 17 | mA | Test current | 2 | ||
| Voltage Tolerance | -5 | 5 | % | Tolerance = 5% | 1 |
CAD (KiCad official)
- Symbol:
1N4744A - 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 (4 pp, sha256
a21fc849834a1030, retrieved 2026-10-22, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-5-5(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).
# 1N4744A
**onsemi** · Zener Diodes · DO-41
1N4744A 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 | Cathode | passive | Cathode, identified by the color band on the DO-41 glass case; the zener voltage VZ for 1N4744A is 15 V typ (14.25 V min, 15.75 V max) at IZ = 17 mA. |
| 2 | A | passive | Anode terminal at the end of the DO-41 glass case opposite the cathode color band; the datasheet gives no further pin detail. |
## 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 | 14.25 | 15 | 15.75 | V | IZ = 17 mA, TL = 30°C ± 1°C, 3/8" lead length | 2 |
| Max. Zener Impedance | ZZ | | | 14 | Ω | @ IZ = 17 mA | 2 |
| Max. Zener Knee Impedance | ZZK | | | 700 | Ω | @ IZK = 0.25 mA | 2 |
| Leakage Current | IR | | | 5 | µA | VR = 11.4 V | 2 |
| Non-Repetitive Peak Reverse Current | IZSM | | | 304 | mA | Square wave reverse surge at 8.3 msec soak time | 2 |
| Power Dissipation | PD | | | 1 | W | @ TL ≤ 50°C, Lead Length = 3/8" | 1 |
| Power Dissipation Derating | | | | 6.67 | mW/°C | Derate above 50°C | 1 |
| Operating and Storage Temperature Range | TJ, TSTG | -65 | | 200 | °C | | 1 |
| Zener Test Current | IZ | | 17 | | mA | Test current | 2 |
| Voltage Tolerance | | -5 | | 5 | % | Tolerance = 5% | 1 |
## CAD (KiCad official)
- Symbol: `1N4744A`
- 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/1n4744a-d.pdf) (4 pp, sha256 `a21fc849834a1030`, retrieved 2026-10-22, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-5-5` (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/1n4744a-datasheet.pdf)