component
DL5240B
Public Made by Adomby adom
YONGYUTAI Zener Diodes, LL-34. 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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DL5240B
YONGYUTAI · Zener Diodes · LL-34
DL5240B from YONGYUTAI, in a LL-34. 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 | YONGYUTAI |
| Package | LL-34 |
| 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 at Tamb=25 C (Note 1) | Ptot | 500 | mW | Tamb=25 C (Note 1) | 1 | ||
| Junction Temperature | Tj | 200 | C | 1 | |||
| Storage Temperature Range | TSTG | -65 | 200 | C | 1 | ||
| Forward voltage | VF | 1.1 | V | IF=200mA | 1 | ||
| Zener voltage tolerance (suffix B) | 5 | % | Note 1: Suffix B indicates +5% tolerance | 2 | |||
| Maximum Zener Impedance | ZZT | 17 | Ohms | IZT=20 mA | 2 | ||
| Maximum Zener Impedance | ZZK | 600 | Ohms | IZK=0.25 mA | 2 | ||
| Maximum Reverse Leakage Current | IR | 3 | µA | VR=8.0 V | 2 | ||
| Maximum Regulator Current | IZM | 45 | mA | 2 | |||
| Nominal Zener Voltage | Vz | 10 | V | IZT=20 mA | 2 | ||
| Thermal resistance junction ambient | RθJA | 0.3 | K/mW | Note 1 | 1 | ||
| Typical Temperature Coefficient | 0.075 | %/ C | 2 |
CAD (KiCad official)
- Symbol:
DL5240B - Footprint:
Diode_SMD:D_MiniMELF - 3D model: LL-34 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: YONGYUTAI datasheet (3 pp, sha256
d741924a98eeecea, retrieved 2026-10-14, 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).
# DL5240B
**YONGYUTAI** · Zener Diodes · LL-34
DL5240B from YONGYUTAI, in a LL-34. 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 | YONGYUTAI |
| Package | LL-34 |
| 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 at Tamb=25 C (Note 1) | Ptot | | | 500 | mW | Tamb=25 C (Note 1) | 1 |
| Junction Temperature | Tj | | | 200 | C | | 1 |
| Storage Temperature Range | TSTG | -65 | | 200 | C | | 1 |
| Forward voltage | VF | | | 1.1 | V | IF=200mA | 1 |
| Zener voltage tolerance (suffix B) | | | | 5 | % | Note 1: Suffix B indicates +5% tolerance | 2 |
| Maximum Zener Impedance | ZZT | | | 17 | Ohms | IZT=20 mA | 2 |
| Maximum Zener Impedance | ZZK | | | 600 | Ohms | IZK=0.25 mA | 2 |
| Maximum Reverse Leakage Current | IR | | | 3 | µA | VR=8.0 V | 2 |
| Maximum Regulator Current | IZM | | | 45 | mA | | 2 |
| Nominal Zener Voltage | Vz | | 10 | | V | IZT=20 mA | 2 |
| Thermal resistance junction ambient | RθJA | | 0.3 | | K/mW | Note 1 | 1 |
| Typical Temperature Coefficient | | | 0.075 | | %/ C | | 2 |
## CAD (KiCad official)
- Symbol: `DL5240B`
- Footprint: `Diode_SMD:D_MiniMELF`
- 3D model: LL-34 (KiCad packages3D, STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [YONGYUTAI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590196408067121152) (3 pp, sha256 `d741924a98eeecea`, retrieved 2026-10-14, 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/dl5240b-datasheet.pdf)