component
1SMA5918B
Public Made by Adomby adom
LGE Zener Diodes, DO-214AC(SMA). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
1SMA5918B
LGE · Zener Diodes · DO-214AC(SMA)
1SMA5918B from LGE, in a DO-214AC(SMA). 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 end marked by the color band; the 1SMA5918B (5.1 V nominal Zener, ±5%) is reverse-biased on this pin in normal operation, with a 1.5 W maximum DC power dissipation at TL = 75 °C. |
| 2 | A | passive | Anode, the end opposite the color band; maximum forward voltage is 1.5 V at IF = 200 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LGE |
| Package | DO-214AC(SMA) |
| 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 | 5.1 | V | @ IZT = 73.5 mA | 2 | ||
| Zener Voltage Tolerance (suffix B) | VZ | -5 | 5 | % | Suffix B indicates ±5% tolerance | 2 | |
| Maximum Zener Impedance | ZZT | 4 | Ω | @ IZT = 73.5 mA | 2 | ||
| Maximum Zener Impedance (knee) | ZZK | 500 | Ω | @ IZK = 1.0 mA | 2 | ||
| Maximum Reverse Leakage Current | IR | 5 | μA | @ VR = 2.0 V | 2 | ||
| Maximum DC Zener Current | IZM | 294 | mA | 2 | |||
| Maximum Forward Voltage | VF | 1.5 | V | IF = 200 mA | 1 | ||
| DC Power Dissipation | PD | 1.5 | W | TL = 75 °C (Note 1) | 1 | ||
| Junction Temperature Range | TJ | -55 | 150 | °C | 1 | ||
| Storage Temperature Range | Ts | -55 | 150 | °C | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | (1) TL = Lead temperature at 5.0 mm2 ( 0.013 mm thick ) copper land areas. | 1 |
CAD (KiCad official)
- Symbol:
1SMA5918B - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files:
1sma5918b-etched.step/1sma5918b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma5918b.step/1sma5918b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LGE datasheet (4 pp, sha256
d363ce234eab8078, 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).
# 1SMA5918B
**LGE** · Zener Diodes · DO-214AC(SMA)
1SMA5918B from LGE, in a DO-214AC(SMA). 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 end marked by the color band; the 1SMA5918B (5.1 V nominal Zener, ±5%) is reverse-biased on this pin in normal operation, with a 1.5 W maximum DC power dissipation at TL = 75 °C. |
| 2 | A | passive | Anode, the end opposite the color band; maximum forward voltage is 1.5 V at IF = 200 mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LGE |
| Package | DO-214AC(SMA) |
| 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 | | 5.1 | | V | @ IZT = 73.5 mA | 2 |
| Zener Voltage Tolerance (suffix B) | VZ | -5 | | 5 | % | Suffix B indicates ±5% tolerance | 2 |
| Maximum Zener Impedance | ZZT | | | 4 | Ω | @ IZT = 73.5 mA | 2 |
| Maximum Zener Impedance (knee) | ZZK | | | 500 | Ω | @ IZK = 1.0 mA | 2 |
| Maximum Reverse Leakage Current | IR | | | 5 | μA | @ VR = 2.0 V | 2 |
| Maximum DC Zener Current | IZM | | | 294 | mA | | 2 |
| Maximum Forward Voltage | VF | | | 1.5 | V | IF = 200 mA | 1 |
| DC Power Dissipation | PD | | | 1.5 | W | TL = 75 °C (Note 1) | 1 |
| Junction Temperature Range | TJ | -55 | | 150 | °C | | 1 |
| Storage Temperature Range | Ts | -55 | | 150 | °C | | 1 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | | (1) TL = Lead temperature at 5.0 mm2 ( 0.013 mm thick ) copper land areas. | 1 |
## CAD (KiCad official)
- Symbol: `1SMA5918B`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files: `1sma5918b-etched.step` / `1sma5918b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1sma5918b.step` / `1sma5918b.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [LGE datasheet](docs/1sma5918b-datasheet.pdf) (4 pp, sha256 `d363ce234eab8078`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/1sma5918b-datasheet.pdf)