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1N4746A-TR
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Vishay Intertech Zener Diodes, DO-41. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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1N4746A-TR
Vishay Intertech · Zener Diodes · DO-41
1N4746A-TR from Vishay Intertech, 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 lead at the end marked by the cathode identification band; for the 1N4746A it is held positive to the anode to regulate at VZ nominal 18 V at IZT 14 mA. |
| 2 | A | passive | Anode, the lead opposite the cathode band; forward voltage is max 1.2 V at IF = 200 mA and total power dissipation is limited to 1300 mW. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Vishay Intertech |
| 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 | -5 | 5 | % | Standard Zener voltage tolerance | 1 | ||
| Power dissipation | Ptot | 1300 | mW | Leads at 4 mm from case kept at ambient temperature | 1 | ||
| Thermal resistance junction to ambient | RthJA | 110 | K/W | Leads at 4 mm from case kept at ambient temperature | 1 | ||
| Junction temperature | Tj | 175 | °C | 1 | |||
| Storage temperature range | Tstg | -65 | 175 | °C | 1 | ||
| Forward voltage | VF | 1.2 | V | IF = 200 mA | 1 | ||
| Reverse leakage current | IR | 5 | µA | VR = 13.7 V | 2 | ||
| Dynamic resistance | ZZT | 20 | Ω | at IZT1, f = 1 kHz | 2 | ||
| Dynamic resistance (knee) | ZZK | 750 | Ω | at IZT2 = 0.25 mA, f = 1 kHz | 2 | ||
| Surge current | IR | 250 | mA | tp = 10 ms | 2 | ||
| Regulator current | IZM | 50 | mA | Electrodes at 4 mm from case kept at ambient temperature | 2 | ||
| Zener voltage nominal | VZ | 18 | V | at IZT1 = 14 mA | 2 | ||
| Test current | IZT1 | 14 | mA | 2 | |||
| Test current (knee) | IZT2 | 0.25 | mA | 2 |
CAD (KiCad official)
- Symbol:
1N4746A-TR - 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: Vishay Intertech datasheet (4 pp, sha256
33369d6dd0299505, 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).
# 1N4746A-TR
**Vishay Intertech** · Zener Diodes · DO-41
1N4746A-TR from Vishay Intertech, 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 lead at the end marked by the cathode identification band; for the 1N4746A it is held positive to the anode to regulate at VZ nominal 18 V at IZT 14 mA. |
| 2 | A | passive | Anode, the lead opposite the cathode band; forward voltage is max 1.2 V at IF = 200 mA and total power dissipation is limited to 1300 mW. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Vishay Intertech |
| 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 | | -5 | | 5 | % | Standard Zener voltage tolerance | 1 |
| Power dissipation | Ptot | | | 1300 | mW | Leads at 4 mm from case kept at ambient temperature | 1 |
| Thermal resistance junction to ambient | RthJA | | | 110 | K/W | Leads at 4 mm from case kept at ambient temperature | 1 |
| Junction temperature | Tj | | | 175 | °C | | 1 |
| Storage temperature range | Tstg | -65 | | 175 | °C | | 1 |
| Forward voltage | VF | | | 1.2 | V | IF = 200 mA | 1 |
| Reverse leakage current | IR | | | 5 | µA | VR = 13.7 V | 2 |
| Dynamic resistance | ZZT | | | 20 | Ω | at IZT1, f = 1 kHz | 2 |
| Dynamic resistance (knee) | ZZK | | | 750 | Ω | at IZT2 = 0.25 mA, f = 1 kHz | 2 |
| Surge current | IR | | | 250 | mA | tp = 10 ms | 2 |
| Regulator current | IZM | | | 50 | mA | Electrodes at 4 mm from case kept at ambient temperature | 2 |
| Zener voltage nominal | VZ | | 18 | | V | at IZT1 = 14 mA | 2 |
| Test current | IZT1 | | 14 | | mA | | 2 |
| Test current (knee) | IZT2 | | 0.25 | | mA | | 2 |
## CAD (KiCad official)
- Symbol: `1N4746A-TR`
- 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:** [Vishay Intertech datasheet](docs/1n4746a-tr-datasheet.pdf) (4 pp, sha256 `33369d6dd0299505`, 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/1n4746a-tr-datasheet.pdf)