component
SMBJ45CA-AT
Public Made by Adomby adom
Brightking ESD And Surge Protection (TVS/ESD), 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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SMBJ45CA-AT
Brightking · ESD And Surge Protection (TVS/ESD) · SMB(DO-214AA)
SMBJ45CA-AT from Brightking, 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 | Brightking |
| Package | SMB(DO-214AA) |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage (bidirectional, SMBJ45CA-AT) | VBR | 50 | 55.3 | V | IT = 1 mA (test current) | 3 | |
| Maximum clamping voltage (bidirectional, SMBJ45CA-AT) | VC | 72.7 | V | @IPP = 8.3 A | 3 | ||
| Reverse leakage current (bidirectional, SMBJ45CA-AT) | IR | 1 | µA | @VRWM | 3 | ||
| Peak pulse power dissipation | PPPM | 600 | Watts | 10/1000µs waveform (Note 1, Note 2, Fig.1) | 1 | ||
| Steady state power dissipation | PM(AV) | 5 | Watts | TA=50℃ (Fig.5) | 1 | ||
| Operating junction and storage temperature range | TJ,TSTG | -55 | 150 | ℃ | Operating junction and storage temperature range | 1 | |
| Reverse stand-off voltage (bidirectional, SMBJ45CA-AT) | VRWM | 45 | V | Reverse stand-off voltage, bidirectional type | 3 | ||
| Typical thermal resistance junction to lead | RθJL | 20 | ℃/W | Typical | 1 | ||
| Typical thermal resistance junction to ambient | RθJA | 100 | ℃/W | Typical | 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 | 2. Mounted on 5.0mm×5.0mm (0.03mm thick) copper pads to each terminal. | 1 |
CAD (KiCad official)
- Symbol:
SMBJ45CA-AT - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
smbj45ca-at-etched.step/smbj45ca-at-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj45ca-at.step/smbj45ca-at.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Brightking datasheet (7 pp, sha256
a2bc93a3b45c5e72, retrieved 2026-10-16, 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).
# SMBJ45CA-AT
**Brightking** · ESD And Surge Protection (TVS/ESD) · SMB(DO-214AA)
SMBJ45CA-AT from Brightking, 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 | Brightking |
| Package | SMB(DO-214AA) |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage (bidirectional, SMBJ45CA-AT) | VBR | 50 | | 55.3 | V | IT = 1 mA (test current) | 3 |
| Maximum clamping voltage (bidirectional, SMBJ45CA-AT) | VC | | | 72.7 | V | @IPP = 8.3 A | 3 |
| Reverse leakage current (bidirectional, SMBJ45CA-AT) | IR | | | 1 | µA | @VRWM | 3 |
| Peak pulse power dissipation | PPPM | 600 | | | Watts | 10/1000µs waveform (Note 1, Note 2, Fig.1) | 1 |
| Steady state power dissipation | PM(AV) | | | 5 | Watts | TA=50℃ (Fig.5) | 1 |
| Operating junction and storage temperature range | TJ,TSTG | -55 | | 150 | ℃ | Operating junction and storage temperature range | 1 |
| Reverse stand-off voltage (bidirectional, SMBJ45CA-AT) | VRWM | | 45 | | V | Reverse stand-off voltage, bidirectional type | 3 |
| Typical thermal resistance junction to lead | RθJL | | 20 | | ℃/W | Typical | 1 |
| Typical thermal resistance junction to ambient | RθJA | | 100 | | ℃/W | Typical | 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 | | 2. Mounted on 5.0mm×5.0mm (0.03mm thick) copper pads to each terminal. | 1 |
## CAD (KiCad official)
- Symbol: `SMBJ45CA-AT`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files: `smbj45ca-at-etched.step` / `smbj45ca-at-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smbj45ca-at.step` / `smbj45ca-at.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Brightking datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588913298016649216) (7 pp, sha256 `a2bc93a3b45c5e72`, retrieved 2026-10-16, 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/smbj45ca-at-datasheet.pdf)