component
1N4731A
Public Made by Adomby adom
XCH(旭昌辉) , DO-41. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
1N4731A
XCH(旭昌辉) · IC · DO-41
1N4731A from XCH(旭昌辉), 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 end marked by the color band; for a Zener it goes to the positive side in reverse breakdown (VZ 4.3 V nominal, 4.09 to 4.52 V at IZT = 58 mA). |
| 2 | A | passive | Anode, the lead at the end without the color band; maximum forward voltage 1.2 V at IF = 200 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | XCH(旭昌辉) |
| Package | DO-41 |
| Category | |
| 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 | 4.09 | 4.3 | 4.52 | V | @IZT 9.0 mA | 3 |
| Maximum Zener impedance | ZZT | 58 | Ω | @IZT 9.0 mA | 3 | ||
| Maximum Zener impedance | ZZK | 400 | Ω | @IZK 1.00 mA | 3 | ||
| Maximum reverse leakage current | IR | 10 | uA | @VR 1.0 V | 3 | ||
| Maximum DC Zener current | IZM | 210 | mA | 3 | |||
| Maximum forward voltage | VF | 1.2 | V | at IF=200mA | 1 | ||
| Storage temperature range | TJ，TSTG | -55 | 150 | ℃ | 1 | ||
| Junction temperature range | TJ，TSTG | -55 | 150 | ℃ | 1 | ||
| DC power dissipation | PD | 1 | W | TL = 75 °C, lead temperature at 3/8'' (9.5mm) from body | 1 |
CAD (KiCad official)
- Symbol:
1N4731A - 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: XCH(旭昌辉) datasheet (3 pp, sha256
d1c9cb277508fa39, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).
# 1N4731A
**XCH(旭昌辉)** · IC · DO-41
1N4731A from XCH(旭昌辉), 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 end marked by the color band; for a Zener it goes to the positive side in reverse breakdown (VZ 4.3 V nominal, 4.09 to 4.52 V at IZT = 58 mA). |
| 2 | A | passive | Anode, the lead at the end without the color band; maximum forward voltage 1.2 V at IF = 200 mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | XCH(旭昌辉) |
| Package | DO-41 |
| Category | |
| 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 | 4.09 | 4.3 | 4.52 | V | @IZT 9.0 mA | 3 |
| Maximum Zener impedance | ZZT | | | 58 | Ω | @IZT 9.0 mA | 3 |
| Maximum Zener impedance | ZZK | | | 400 | Ω | @IZK 1.00 mA | 3 |
| Maximum reverse leakage current | IR | | | 10 | uA | @VR 1.0 V | 3 |
| Maximum DC Zener current | IZM | | | 210 | mA | | 3 |
| Maximum forward voltage | VF | | | 1.2 | V | at IF=200mA | 1 |
| Storage temperature range | TJ，TSTG | -55 | | 150 | ℃ | | 1 |
| Junction temperature range | TJ，TSTG | -55 | | 150 | ℃ | | 1 |
| DC power dissipation | PD | | | 1 | W | TL = 75 °C, lead temperature at 3/8'' (9.5mm) from body | 1 |
## CAD (KiCad official)
- Symbol: `1N4731A`
- 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:** [XCH(旭昌辉) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603394557682348032) (3 pp, sha256 `d1c9cb277508fa39`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/1n4731a-datasheet.pdf)