component
DL4749A
Public Made by Adomby adom
LGE Zener Diodes, MELF. 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
markdownDL4749A
LGE · Zener Diodes · MELF
DL4749A from LGE, in a MELF. 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 | MELF |
| 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 (A suffix) | Vz tol | -5 | 5 | % | Suffix A | 1 | |
| Nominal zener voltage | VZ | 24 | V | IZT 10.5 mA | 2 | ||
| Maximum dynamic impedance | ZZT | 25 | Ω | IZT 10.5 mA | 2 | ||
| Maximum knee dynamic impedance | ZZK | 750 | Ω | IZK 0.25 mA | 2 | ||
| Maximum reverse leakage current | IR | 5 | μA | VR 18.2 V | 2 | ||
| Forward voltage | VF | 1.2 | V | IF=200mA | 1 | ||
| Storage temperature range | Ts | -55 | 175 | °C | 1 | ||
| Junction temperature | TJ | 175 | °C | Valid provided electrodes kept at ambient temperature (footnote 1) | 1 | ||
| Power dissipation | PDiss | 1 | W | Tamb 50 (footnote 1) | 1 | ||
| Junction to ambient thermal resistance | RThJA | 170 | K/W | I=9.5mm (3/8in), TL=constant | 1 |
CAD (KiCad official)
- Symbol:
DL4749A - Footprint:
Diode_SMD:D_MELF - 3D model: MELF (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LGE datasheet (3 pp, sha256
a224b6085d68189f, 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).