component
1SMB5921B
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.
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1SMB5921B
BORN · Zener Diodes · SMB(DO-214AA)
1SMB5921B 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, minimum | VZ(MIN) | 6.46 | V | IZT = 55.1 mA | 2 | ||
| Zener voltage, maximum | VZ(MAX) | 7.14 | V | IZT = 55.1 mA | 2 | ||
| Reverse current, maximum | IR | 5 | µAdc | VR = 5.2 V | 2 | ||
| Max. DC current | IZM | 220 | mA | 2 | |||
| Power Dissipation | PD | 3 | W | TL = 75°C | 1 | ||
| Max Forward Voltage | VF | 1.2 | V | IF = 200 mA | 1 | ||
| Storage Temperature Range | TSTG | -55 | 150 | °C | 1 | ||
| Operating Junction Temperature Range | TJ | -55 | 150 | °C | 1 | ||
| 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:
1SMB5921B - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
1smb5921b-etched.step/1smb5921b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1smb5921b.step/1smb5921b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BORN datasheet (5 pp, sha256
3b8ee48d69f02848, 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).
# 1SMB5921B
**BORN** · Zener Diodes · SMB(DO-214AA)
1SMB5921B 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, minimum | VZ(MIN) | 6.46 | | | V | IZT = 55.1 mA | 2 |
| Zener voltage, maximum | VZ(MAX) | | | 7.14 | V | IZT = 55.1 mA | 2 |
| Reverse current, maximum | IR | | | 5 | µAdc | VR = 5.2 V | 2 |
| Max. DC current | IZM | | | 220 | mA | | 2 |
| Power Dissipation | PD | | | 3 | W | TL = 75°C | 1 |
| Max Forward Voltage | VF | | | 1.2 | V | IF = 200 mA | 1 |
| Storage Temperature Range | TSTG | -55 | | 150 | °C | | 1 |
| Operating Junction Temperature Range | TJ | -55 | | 150 | °C | | 1 |
| 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: `1SMB5921B`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files: `1smb5921b-etched.step` / `1smb5921b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1smb5921b.step` / `1smb5921b.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [BORN datasheet](docs/1smb5921b-datasheet.pdf) (5 pp, sha256 `3b8ee48d69f02848`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/1smb5921b-datasheet.pdf)