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1N4747ATA
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Tak Cheong Zener Diodes, DO-41. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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1N4747ATA
Tak Cheong · Zener Diodes · DO-41
1N4747ATA from Tak Cheong, 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, indicated by the polarity band; zener voltage of 20V nominal (19.00V min to 21.00V max) at IZT = 12.5 mA for the 1N4747A. |
| 2 | A | passive | Anode; the 1N4747A is a 1 W zener with operating and storage temperature range of -65 to +200 °C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Tak Cheong |
| 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 | 19 | 20 | 21 | V | @IZT = 12.5 mA | 2 |
| Zener Voltage Tolerance | -5 | 5 | % | standard tolerance on nominal zener voltage | 2 | ||
| Zener Test Current | IZT | 12.5 | mA | 2 | |||
| Zener Impedance | ZZT | 22 | Ω | @IZT | 2 | ||
| Zener Impedance (knee) | ZZK | 750 | Ω | @IZK = 0.25 mA | 2 | ||
| Leakage Current | IR | 5 | uA | @VR = 15.2 V | 2 | ||
| Forward Voltage | VF | 1.2 | V | @IF = 200mA, for 30V below types | 2 | ||
| Maximum Steady State Power Dissipation | PD | 1 | W | @TL≤50℃, Lead Length = 3/8" | 1 | ||
| Power Derating Above 50℃ | 6.67 | mW/℃ | Derate above 50℃ | 1 | |||
| Operating and Storage Temperature Range | TJ, Tstg | -65 | 200 | °C | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | § Solder Hot Dip Tin (Sn) Lead Finish Specification Features: | 1 |
CAD (KiCad official)
- Symbol:
1N4747ATA - 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: Tak Cheong datasheet (3 pp, sha256
20c61d98f60a9f32, retrieved 2026-10-26, tier: lcsc) - 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).
# 1N4747ATA
**Tak Cheong** · Zener Diodes · DO-41
1N4747ATA from Tak Cheong, 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, indicated by the polarity band; zener voltage of 20V nominal (19.00V min to 21.00V max) at IZT = 12.5 mA for the 1N4747A. |
| 2 | A | passive | Anode; the 1N4747A is a 1 W zener with operating and storage temperature range of -65 to +200 °C. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Tak Cheong |
| 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 | 19 | 20 | 21 | V | @IZT = 12.5 mA | 2 |
| Zener Voltage Tolerance | | -5 | | 5 | % | standard tolerance on nominal zener voltage | 2 |
| Zener Test Current | IZT | | 12.5 | | mA | | 2 |
| Zener Impedance | ZZT | | | 22 | Ω | @IZT | 2 |
| Zener Impedance (knee) | ZZK | | | 750 | Ω | @IZK = 0.25 mA | 2 |
| Leakage Current | IR | | | 5 | uA | @VR = 15.2 V | 2 |
| Forward Voltage | VF | | | 1.2 | V | @IF = 200mA, for 30V below types | 2 |
| Maximum Steady State Power Dissipation | PD | | | 1 | W | @TL≤50℃, Lead Length = 3/8" | 1 |
| Power Derating Above 50℃ | | | | 6.67 | mW/℃ | Derate above 50℃ | 1 |
| Operating and Storage Temperature Range | TJ, Tstg | -65 | | 200 | °C | | 1 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | | tin | § Solder Hot Dip Tin (Sn) Lead Finish Specification Features: | 1 |
## CAD (KiCad official)
- Symbol: `1N4747ATA`
- 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:** [Tak Cheong datasheet](docs/1n4747ata-datasheet.pdf) (3 pp, sha256 `20c61d98f60a9f32`, retrieved 2026-10-26, tier: lcsc)
- **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/1n4747ata-datasheet.pdf)