component
SMBJ140A
Public Made by Adomby adom
FUXINSEMI ESD And Surge Protection (TVS/ESD), DO-214AA(SMB). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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SMBJ140A
FUXINSEMI · ESD And Surge Protection (TVS/ESD) · DO-214AA(SMB)
SMBJ140A from FUXINSEMI, in a DO-214AA(SMB). 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 cathode band) of the uni-directional SMBJ140A TVS; connects to the protected positive line, with VRWM 140 V and VBR 155-171 V at 1.0 mA. |
| 2 | A | passive | Anode of the uni-directional SMBJ140A TVS; connects to ground/return, clamping at a maximum VC of 226.8 V at IPP 2.65 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | FUXINSEMI |
| Package | DO-214AA(SMB) |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse stand-off voltage | VRWM | 140 | V | 3 | |||
| Breakdown voltage | VBR | 155 | 171 | V | @IT = 1.0 mA | 3 | |
| Maximum clamping voltage | VC | 226.8 | V | @IPP | 3 | ||
| Peak pulse current | IPP | 2.65 | A | 10/1000 µs waveform | 3 | ||
| Maximum reverse leakage current | IR | 5 | µA | @VRWM | 3 | ||
| Breakdown test current | IT | 1 | mA | 3 | |||
| Peak power dissipation | PPPM | 600 | W | 10/1000 µs waveform, Note 1, 2 & Fig. 1 | 1 | ||
| Steady state power dissipation | PM(AV) | 5 | W | at TL=75 °C, Note 2 | 1 | ||
| Peak forward surge current | IFSM | 100 | A | 8.3ms single half sine-wave, Note 3 | 1 | ||
| Maximum instantaneous forward voltage | VF | 3.5 | V | at 50A, uni-directional only, VBR<200V | 1 | ||
| Operating junction temperature range | TJ | -55 | 150 | °C | 1 | ||
| Storage temperature range | TSTG | -55 | 150 | °C | 1 | ||
| Typical thermal resistance, junction to case | RθJC | 30 | °C/W | 1 | |||
| Typical thermal resistance, junction to ambient | RθJA | 50 | °C/W | 1 |
CAD (KiCad official)
- Symbol:
SMBJ140A - Footprint:
Diode_SMD:D_SMB - 3D model: DO-214AA(SMB) (KiCad packages3D, STEP)
- 3D model files:
smbj140a-etched.step/smbj140a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj140a.step/smbj140a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: FUXINSEMI datasheet (6 pp, sha256
0ca2804d68ee4162, 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).
# SMBJ140A
**FUXINSEMI** · ESD And Surge Protection (TVS/ESD) · DO-214AA(SMB)
SMBJ140A from FUXINSEMI, in a DO-214AA(SMB). 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 cathode band) of the uni-directional SMBJ140A TVS; connects to the protected positive line, with VRWM 140 V and VBR 155-171 V at 1.0 mA. |
| 2 | A | passive | Anode of the uni-directional SMBJ140A TVS; connects to ground/return, clamping at a maximum VC of 226.8 V at IPP 2.65 A. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | FUXINSEMI |
| Package | DO-214AA(SMB) |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse stand-off voltage | VRWM | | 140 | | V | | 3 |
| Breakdown voltage | VBR | 155 | | 171 | V | @IT = 1.0 mA | 3 |
| Maximum clamping voltage | VC | | | 226.8 | V | @IPP | 3 |
| Peak pulse current | IPP | | | 2.65 | A | 10/1000 µs waveform | 3 |
| Maximum reverse leakage current | IR | | | 5 | µA | @VRWM | 3 |
| Breakdown test current | IT | | 1 | | mA | | 3 |
| Peak power dissipation | PPPM | | | 600 | W | 10/1000 µs waveform, Note 1, 2 & Fig. 1 | 1 |
| Steady state power dissipation | PM(AV) | | | 5 | W | at TL=75 °C, Note 2 | 1 |
| Peak forward surge current | IFSM | | | 100 | A | 8.3ms single half sine-wave, Note 3 | 1 |
| Maximum instantaneous forward voltage | VF | | | 3.5 | V | at 50A, uni-directional only, VBR<200V | 1 |
| Operating junction temperature range | TJ | -55 | | 150 | °C | | 1 |
| Storage temperature range | TSTG | -55 | | 150 | °C | | 1 |
| Typical thermal resistance, junction to case | RθJC | | 30 | | °C/W | | 1 |
| Typical thermal resistance, junction to ambient | RθJA | | 50 | | °C/W | | 1 |
## CAD (KiCad official)
- Symbol: `SMBJ140A`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: DO-214AA(SMB) (KiCad packages3D, STEP)
- 3D model files: `smbj140a-etched.step` / `smbj140a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smbj140a.step` / `smbj140a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [FUXINSEMI datasheet](docs/smbj140a-datasheet.pdf) (6 pp, sha256 `0ca2804d68ee4162`, 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/smbj140a-datasheet.pdf)