component
1SMB5945B
Public Made by Adomby adom
BORN Zener Diodes, SMB(DO-214AA). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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1SMB5945B
BORN · Zener Diodes · SMB(DO-214AA)
1SMB5945B 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 1SMB5945B the Zener voltage is 64.6 V min to 71.4 V max at IZT = 5.5 mA, and maximum DC Zener current is 22 mA. |
| 2 | A | passive | Anode terminal of the Zener diode; the datasheet gives a maximum forward voltage of 1.2 V at IF = 200 mA and 3 W power dissipation at TL = 75°C. |
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 | 64.6 | 71.4 | V | IZT=5.5 mA | 3 | |
| Test current | IZT | 5.5 | mA | 3 | |||
| Dynamic impedance | ZZT | 120 | Ω | 3 | |||
| Knee impedance | ZZK | 1700 | Ω | IZK=0.25 mA | 3 | ||
| Reverse current | IR | 1 | µAdc | VR=51.7 V | 3 | ||
| Max DC current | IZM | 22 | mA | 3 | |||
| Power Dissipation | PD | 3 | W | TL=75°C | 1 | ||
| Thermal Resistance Junction To Ambient Air | RθJA | 100 | °C/W | 1 | |||
| Thermal Resistance Junction To Leads | RθJL | 25 | °C/W | 1 | |||
| Storage Temperature Range | TSTG | -55 | 150 | °C | 1 | ||
| Operating Junction Temperature Range | TJ | -55 | 150 | °C | 1 | ||
| Forward Voltage | VF | 1.2 | V | IF=200 mA | 1 |
CAD (KiCad official)
- Symbol:
1SMB5945B - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
1smb5945b-etched.step/1smb5945b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1smb5945b.step/1smb5945b.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).
# 1SMB5945B
**BORN** · Zener Diodes · SMB(DO-214AA)
1SMB5945B 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 1SMB5945B the Zener voltage is 64.6 V min to 71.4 V max at IZT = 5.5 mA, and maximum DC Zener current is 22 mA. |
| 2 | A | passive | Anode terminal of the Zener diode; the datasheet gives a maximum forward voltage of 1.2 V at IF = 200 mA and 3 W power dissipation at TL = 75°C. |
## 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 | 64.6 | | 71.4 | V | IZT=5.5 mA | 3 |
| Test current | IZT | | 5.5 | | mA | | 3 |
| Dynamic impedance | ZZT | | | 120 | Ω | | 3 |
| Knee impedance | ZZK | | | 1700 | Ω | IZK=0.25 mA | 3 |
| Reverse current | IR | | | 1 | µAdc | VR=51.7 V | 3 |
| Max DC current | IZM | | | 22 | mA | | 3 |
| Power Dissipation | PD | | | 3 | W | TL=75°C | 1 |
| Thermal Resistance Junction To Ambient Air | RθJA | | 100 | | °C/W | | 1 |
| Thermal Resistance Junction To Leads | RθJL | | 25 | | °C/W | | 1 |
| Storage Temperature Range | TSTG | -55 | | 150 | °C | | 1 |
| Operating Junction Temperature Range | TJ | -55 | | 150 | °C | | 1 |
| Forward Voltage | VF | | | 1.2 | V | IF=200 mA | 1 |
## CAD (KiCad official)
- Symbol: `1SMB5945B`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files: `1smb5945b-etched.step` / `1smb5945b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1smb5945b.step` / `1smb5945b.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [BORN datasheet](docs/1smb5945b-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/1smb5945b-datasheet.pdf)