component
1SMB5943B
Public Made by Adomby adom
BORN Zener Diodes, SMB(DO-214AA). 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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README
markdown1SMB5943B
BORN · Zener Diodes · SMB(DO-214AA)
1SMB5943B from BORN, in a SMB(DO-214AA). 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 | BORN |
| Package | SMB(DO-214AA) |
| 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 (1SMB5943B, B suffix) | VZ | 53.2 | 58.8 | V | IZT = 6.7 mA | 2 | |
| Reverse current | IR(Max.) | 1 | µAdc | VR = 42.6 V | 2 | ||
| Max DC current | IZM | 26 | mA | 2 | |||
| Max forward voltage | VF | 1.2 | V | IF = 200 mA | 1 | ||
| Power dissipation | PD | 3 | W | TL = 75°C | 1 | ||
| Storage temperature range | TSTG | -55 | 150 | °C | 1 | ||
| Operating junction temperature range | TJ | -55 | 150 | °C | 1 | ||
| Dynamic impedance | ZZT | 86 | Ω | IZT = 6.7 mA | 2 | ||
| Knee current | IZK | 0.25 | mA | 2 | |||
| Knee impedance | ZZK | 1300 | Ω | IZK = 0.25 mA | 2 | ||
| Thermal resistance junction to ambient air | RθJA | 100 | °C/W | 1 | |||
| Thermal resistance junction to leads | RθJL | 25 | °C/W | 1 |
CAD (KiCad official)
- Symbol:
1SMB5943B - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
1smb5943b-etched.step/1smb5943b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1smb5943b.step/1smb5943b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BORN datasheet (5 pp, sha256
d157179bacadcf36, retrieved 2026-10-22, 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).