component
1N4749
Public Made by Adomby adom
LGE 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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1N4749
LGE · Zener Diodes · DO-41
1N4749 from LGE, 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 | LGE |
| 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 |
|---|---|---|---|---|---|---|---|
| Power dissipation | PDiss | 1 | W | @ Tamb 50 | 1 | ||
| Junction temperature | TJ | 200 | °C | 1 | |||
| Storage temperature range | Ts | -55 | 200 | °C | 1 | ||
| Forward voltage | VF | 1.2 | V | IF=200mA | 1 | ||
| Zener voltage tolerance (standard, no suffix) | -10 | 10 | % | Standard zener voltage tolerance; suffix A for ±5% | 1 | ||
| Maximum dynamic impedance | ZZT | 25 | Ω | @IZT | 2 | ||
| Maximum dynamic impedance | ZZK | 750 | Ω | @IZK | 2 | ||
| Nominal zener voltage | VZ | 24 | V | Test current IZT 10.5 mA | 2 | ||
| Test current | IZT | 10.5 | mA | 2 | |||
| Junction ambient thermal resistance | RThJA | 100 | K/W | I=9.5mm(3/8in), TL=constant | 1 |
CAD (KiCad official)
- Symbol:
1N4749 - 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: LGE datasheet (3 pp, sha256
ea660af0dfc6f8c4, retrieved 2026-10-21, tier: lcsc) - 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).
# 1N4749
**LGE** · Zener Diodes · DO-41
1N4749 from LGE, 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 | LGE |
| 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 |
|---|---|---|---|---|---|---|---|
| Power dissipation | PDiss | | | 1 | W | @ Tamb 50 | 1 |
| Junction temperature | TJ | | | 200 | °C | | 1 |
| Storage temperature range | Ts | -55 | | 200 | °C | | 1 |
| Forward voltage | VF | | | 1.2 | V | IF=200mA | 1 |
| Zener voltage tolerance (standard, no suffix) | | -10 | | 10 | % | Standard zener voltage tolerance; suffix A for ±5% | 1 |
| Maximum dynamic impedance | ZZT | | | 25 | Ω | @IZT | 2 |
| Maximum dynamic impedance | ZZK | | | 750 | Ω | @IZK | 2 |
| Nominal zener voltage | VZ | | 24 | | V | Test current IZT 10.5 mA | 2 |
| Test current | IZT | | 10.5 | | mA | | 2 |
| Junction ambient thermal resistance | RThJA | | 100 | | K/W | I=9.5mm(3/8in), TL=constant | 1 |
## CAD (KiCad official)
- Symbol: `1N4749`
- 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:** [LGE datasheet](docs/1n4749-datasheet.pdf) (3 pp, sha256 `ea660af0dfc6f8c4`, retrieved 2026-10-21, tier: lcsc)
- **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/1n4749-datasheet.pdf)