component
1SMB5940B
Public Made by Adomby adom
BORN Zener Diodes, SMB(DO-214AA). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
1SMB5940B
BORN · Zener Diodes · SMB(DO-214AA)
1SMB5940B 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, marked by the color band on the SMB(DO-214AA) body; for 1SMB5940B the Zener voltage is 40.85 V min to 45.15 V max at IZT = 8.7 mA. |
| 2 | A | passive | Anode terminal of the Zener diode; the datasheet gives maximum forward voltage of 1.2 V at IF = 200 mA. |
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 | VZ | 40.85 | 45.15 | V | IZT=8.7 mA | 2 | |
| Test current | IZT | 8.7 | mA | 2 | |||
| Dynamic impedance | ZZT | 53 | Ω | at IZT | 2 | ||
| Knee current | IZK | 0.25 | mA | 2 | |||
| Knee impedance | ZZK | 950 | Ω | at IZK | 2 | ||
| Reverse current | IR | 1 | µAdc | VR=32.7 V | 2 | ||
| Reverse voltage | VR | 32.7 | V | 2 | |||
| Max DC current | IZM | 34 | mA | 2 | |||
| Max forward voltage | VF | 1.2 | V | IF=200mA | 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 | ||
| Thermal resistance junction to ambient | RθJA | 100 | °C/W | Junction to ambient air | 1 | ||
| Thermal resistance junction to leads | RθJL | 25 | °C/W | Junction to leads | 1 |
CAD (KiCad official)
- Symbol:
1SMB5940B - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
1smb5940b-etched.step/1smb5940b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1smb5940b.step/1smb5940b.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 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).
# 1SMB5940B
**BORN** · Zener Diodes · SMB(DO-214AA)
1SMB5940B 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, marked by the color band on the SMB(DO-214AA) body; for 1SMB5940B the Zener voltage is 40.85 V min to 45.15 V max at IZT = 8.7 mA. |
| 2 | A | passive | Anode terminal of the Zener diode; the datasheet gives maximum forward voltage of 1.2 V at IF = 200 mA. |
## 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 | VZ | 40.85 | | 45.15 | V | IZT=8.7 mA | 2 |
| Test current | IZT | | 8.7 | | mA | | 2 |
| Dynamic impedance | ZZT | | | 53 | Ω | at IZT | 2 |
| Knee current | IZK | | 0.25 | | mA | | 2 |
| Knee impedance | ZZK | | | 950 | Ω | at IZK | 2 |
| Reverse current | IR | | | 1 | µAdc | VR=32.7 V | 2 |
| Reverse voltage | VR | | 32.7 | | V | | 2 |
| Max DC current | IZM | | | 34 | mA | | 2 |
| Max forward voltage | VF | | | 1.2 | V | IF=200mA | 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 |
| Thermal resistance junction to ambient | RθJA | | 100 | | °C/W | Junction to ambient air | 1 |
| Thermal resistance junction to leads | RθJL | | 25 | | °C/W | Junction to leads | 1 |
## CAD (KiCad official)
- Symbol: `1SMB5940B`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files: `1smb5940b-etched.step` / `1smb5940b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1smb5940b.step` / `1smb5940b.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [BORN datasheet](docs/1smb5940b-datasheet.pdf) (5 pp, sha256 `d157179bacadcf36`, 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/1smb5940b-datasheet.pdf)