component
1N5221B
Public Made by Adomby adom
LGE Zener Diodes, DO-35. 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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1N5221B
LGE · Zener Diodes · DO-35
1N5221B from LGE, in a DO-35. 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-35 |
| 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 |
|---|---|---|---|---|---|---|---|
| Storage temperature range | Ts | -55 | 175 | °C | 1 | ||
| Junction temperature | TJ | 175 | °C | 1 | |||
| Power dissipation | Ptot | 500 | mW | Tamb=25°C; note 1: leads at 10 mm from case kept at ambient temperature | 1 | ||
| Forward voltage | VF | 1.2 | V | IF=200 mA | 1 | ||
| Maximum dynamic impedance | ZZT | 30 | Ω | @ IZT=20 mA | 2 | ||
| Maximum dynamic impedance | ZZK | 1200 | Ω | @ IZK=0.25 mA | 2 | ||
| Maximum reverse leakage current | IRM | 100 | µA | VR=1.0 V | 2 | ||
| Zener voltage tolerance (B suffix, standard ±5%) | VZ | -5 | 5 | % | B suffix; other tolerances available upon request | 1 | |
| Nominal Zener voltage | VZ | 2.4 | V | @ IZT=20 mA | 2 | ||
| Temperature coefficient of Zener voltage | αVZ | -0.085 | %/°C | @ IZT=20 mA | 2 |
CAD (KiCad official)
- Symbol:
1N5221B - Footprint:
Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal - 3D model: DO-35 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LGE datasheet (3 pp, sha256
da45416437436381, 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).
# 1N5221B
**LGE** · Zener Diodes · DO-35
1N5221B from LGE, in a DO-35. 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-35 |
| 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 |
|---|---|---|---|---|---|---|---|
| Storage temperature range | Ts | -55 | | 175 | °C | | 1 |
| Junction temperature | TJ | | | 175 | °C | | 1 |
| Power dissipation | Ptot | | | 500 | mW | Tamb=25°C; note 1: leads at 10 mm from case kept at ambient temperature | 1 |
| Forward voltage | VF | | | 1.2 | V | IF=200 mA | 1 |
| Maximum dynamic impedance | ZZT | | | 30 | Ω | @ IZT=20 mA | 2 |
| Maximum dynamic impedance | ZZK | | | 1200 | Ω | @ IZK=0.25 mA | 2 |
| Maximum reverse leakage current | IRM | | | 100 | µA | VR=1.0 V | 2 |
| Zener voltage tolerance (B suffix, standard ±5%) | VZ | -5 | | 5 | % | B suffix; other tolerances available upon request | 1 |
| Nominal Zener voltage | VZ | | 2.4 | | V | @ IZT=20 mA | 2 |
| Temperature coefficient of Zener voltage | αVZ | | -0.085 | | %/°C | @ IZT=20 mA | 2 |
## CAD (KiCad official)
- Symbol: `1N5221B`
- Footprint: `Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal`
- 3D model: DO-35 (KiCad packages3D, STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [LGE datasheet](docs/1n5221b-datasheet.pdf) (3 pp, sha256 `da45416437436381`, 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/1n5221b-datasheet.pdf)