component
1SMA5931B
Public Made by Adomby adom
LGE Zener Diodes, DO-214AC(SMA). Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, 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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Contents
README
markdown1SMA5931B
LGE · Zener Diodes · DO-214AC(SMA)
1SMA5931B 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 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-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 |
|---|---|---|---|---|---|---|---|
| Zener voltage tolerance (suffix B) | VZ | -5 | 5 | % | Suffix B = ±5% tolerance | 2 | |
| Maximum Zener impedance | ZZT | 12 | Ω | @ IZT = 20.8 mA | 2 | ||
| Maximum Zener impedance at knee | ZZK | 650 | Ω | @ IZK = 0.25 mA | 2 | ||
| Maximum reverse leakage current | IR | 1 | μA | @ VR = 13.7 V | 2 | ||
| Maximum DC zener current | IZM | 83 | mA | 2 | |||
| DC power dissipation | PD | 1.5 | W | @ TL = 75 °C | 1 | ||
| DC power dissipation | PD | 0.5 | W | @ Ta = 25 °C (FR-4 board) | 1 | ||
| Operating junction and storage temperature range | TJ, TSTG | -65 | 150 | °C | 1 | ||
| Nominal Zener voltage | VZ | 18 | V | @ IZT = 20.8 mA | 2 | ||
| Derate above 75 °C (DC power dissipation at TL) | 20 | mW/°C | Measured zero lead length (1" square copper pad, FR-4 board) | 1 | |||
| Thermal resistance junction to lead | RӨJL | 50 | °C/W | 1 | |||
| Derate above 25 °C (DC power dissipation at Ta) | 4 | mW/°C | FR-4 board | 1 | |||
| Thermal resistance junction to ambient | RӨJA | 250 | °C/W | FR-4 board | 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 | Measured zero lead length(1" square copper pad, FR-4 board) 20 | 1 |
CAD (KiCad official)
- Symbol:
1SMA5931B - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files:
1sma5931b-etched.step/1sma5931b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma5931b.step/1sma5931b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LGE datasheet (2 pp, sha256
2d9536ccf7f2af5d, 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).