component
DL4733A
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.
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DL4733A
LGE · Zener Diodes · MELF
DL4733A 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 (suffix A, ±5%) | VZ | -5 | 5 | % | suffix A = ±5%; standard part is ±10% | 1 | |
| Maximum dynamic impedance | ZZT | 7 | Ω | at IZT = 49 mA | 2 | ||
| Maximum dynamic impedance (knee) | ZZK | 550 | Ω | at IZK (see review_required) | 2 | ||
| Maximum regulator current | IZM | 178 | mA | Tamb = 50 | 2 | ||
| Max surge current | 890 | mA | 8.3 ms | 2 | |||
| Forward voltage | VF | 1.2 | V | IF = 200 mA | 1 | ||
| Power dissipation | PDiss | 1 | W | @ Tamb 50; electrodes kept at ambient temperature | 1 | ||
| Junction temperature | TJ | 175 | °C | 1 | |||
| Storage temperature range | Ts | -55 | 175 | °C | 1 | ||
| Thermal resistance, junction to ambient | RThJA | 170 | K/W | I = 9.5 mm (3/8 in), TL = constant | 1 | ||
| Nominal zener voltage | VZ | 5.1 | V | nominal, at IZT = 49 mA | 2 |
CAD (KiCad official)
- Symbol:
DL4733A - 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).
# DL4733A
**LGE** · Zener Diodes · MELF
DL4733A 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 (suffix A, ±5%) | VZ | -5 | | 5 | % | suffix A = ±5%; standard part is ±10% | 1 |
| Maximum dynamic impedance | ZZT | | | 7 | Ω | at IZT = 49 mA | 2 |
| Maximum dynamic impedance (knee) | ZZK | | | 550 | Ω | at IZK (see review_required) | 2 |
| Maximum regulator current | IZM | | | 178 | mA | Tamb = 50 | 2 |
| Max surge current | | | | 890 | mA | 8.3 ms | 2 |
| Forward voltage | VF | | | 1.2 | V | IF = 200 mA | 1 |
| Power dissipation | PDiss | | | 1 | W | @ Tamb 50; electrodes kept at ambient temperature | 1 |
| Junction temperature | TJ | | | 175 | °C | | 1 |
| Storage temperature range | Ts | -55 | | 175 | °C | | 1 |
| Thermal resistance, junction to ambient | RThJA | | 170 | | K/W | I = 9.5 mm (3/8 in), TL = constant | 1 |
| Nominal zener voltage | VZ | | 5.1 | | V | nominal, at IZT = 49 mA | 2 |
## CAD (KiCad official)
- Symbol: `DL4733A`
- 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](docs/dl4733a-datasheet.pdf) (3 pp, sha256 `a224b6085d68189f`, 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/dl4733a-datasheet.pdf)