component
1N4749A
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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdown1N4749A
LGE · Zener Diodes · DO-41
1N4749A 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage | Vz | 23.52 | 24 | 24.48 | V | Iz=10.5 mA | 2 |
| Zener voltage tolerance (A suffix, ±5% on nominal Vz) | Vz | -5 | 5 | % | Tolerance on nominal Vz value; 1N47…A has no C/D tight-tolerance suffix | 3 | |
| Reverse current | Ir | 5 | uA | Vr=18.2 V | 2 | ||
| Dynamic resistance | rd | 25 | Ω | Iz=10.5 mA | 2 | ||
| Forward voltage | VF | 1.2 | V | IF=200 mA (Note 5) | 3 | ||
| Peak power dissipation | PD | 1 | W | TA=50°C, mounted on 5.0mm2 land areas (Note 1) | 1 | ||
| Derating above 50°C | PD | 6.67 | mW/°C | Derate above 50°C | 1 | ||
| Peak forward surge current | IFSM | 10 | A | 8.3 ms single half sine-wave superimposed on rated load, JEDEC method (Note 2) | 1 | ||
| Operating and storage temperature range | TJ, TSTG | -55 | 200 | °C | 1 |
CAD (KiCad official)
- Symbol:
1N4749A - 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 (4 pp, sha256
00ae2f53593913b9, 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).