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DL5228B
Public Made by Adomby adom
YONGYUTAI Zener Diodes, LL-34. Pinout cross-checked by two models against the datasheet, 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
markdownDL5228B
YONGYUTAI · Zener Diodes · LL-34
DL5228B 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 end, marked by the color band on the MINI MELF glass body; the Zener (DL5228B, nominal 3.9 V at IZT=20 mA) conducts in reverse with this terminal positive. |
| 2 | A | passive | Anode terminal at the end opposite the color band; forward voltage is max 1.1 V at IF=200 mA. |
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 |
|---|---|---|---|---|---|---|---|
| Nominal Zener Voltage | Vz | 3.9 | V | @IZT=20mA, TA=25C | 2 | ||
| Zener Voltage Tolerance (B suffix) | -5 | 5 | % | Suffix B indicates ±5% tolerance | 2 | ||
| Test Current | IZT | 20 | mA | 2 | |||
| Maximum Zener Impedance | ZZT | 23 | Ohms | @IZT=20mA | 2 | ||
| Maximum Zener Impedance (knee) | ZZK | 1900 | Ohms | @IZK=0.25mA | 2 | ||
| Maximum Reverse Leakage Current | IR | 10 | µA | @VR=1.0V | 2 | ||
| Maximum Regulator Current | IZM | 115 | mA | 2 | |||
| Typical Temperature Coefficient | -0.06 | %/C | 2 | ||||
| Forward Voltage | VF | 1.1 | V | IF=200mA | 1 | ||
| Power Dissipation | Ptot | 500 | mW | Tamb=25C (Note 1) | 1 | ||
| Junction Temperature | Tj | 200 | C | 1 | |||
| Storage Temperature Range | TSTG | -65 | 200 | C | 1 | ||
| Thermal Resistance Junction to Ambient | RθJA | 0.3 | K/mW | Note 1 | 1 |
CAD (KiCad official)
- Symbol:
DL5228B - 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 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-5-5(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).