component
SMDJ43A
Public Made by Adomby adom
TWGMC ESD And Surge Protection (TVS/ESD), DO-214AB(SMC). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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SMDJ43A
TWGMC · ESD And Surge Protection (TVS/ESD) · DO-214AB(SMC)
SMDJ43A from TWGMC, in a DO-214AB(SMC). 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 | Cathode | passive | Cathode terminal of the unidirectional SMDJ43A TVS diode, which is the polarity-marked side of the device as listed in the datasheet PINNING table. |
| 2 | Anode | passive | Anode terminal of the unidirectional SMDJ43A TVS diode, opposite the cathode, as listed in the datasheet PINNING table. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TWGMC |
| Package | DO-214AB(SMC) |
| 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 (min) | VBR | 47.8 | V | Test current IT = 1 mA | 2 | ||
| Breakdown voltage (max) | VBR | 52.8 | V | Test current IT = 1 mA | 2 | ||
| Max. clamp voltage | VC | 69.4 | V | VC @ IPP = 43.2 A | 2 | ||
| Max. peak pulse current | IPP | 43.2 | A | 2 | |||
| Max. reverse leakage current | IR | 2 | uA | IR@VR | 2 | ||
| Peak pulse power dissipation | PPPM | 3000 | W | TA=25℃, 10x1000 us waveform (Fig.1) (Note 1, 2) | 1 | ||
| Power dissipation on infinite heat sink | PM(AV) | 6.5 | W | TA=50℃ | 1 | ||
| Peak forward surge current | IFSM | 300 | A | 8.3ms single half sine wave (Note 3) | 1 | ||
| Maximum instantaneous forward voltage | VF | 3.5 | V | At 100A, unidirectional only | 1 | ||
| Operating junction and storage temperature range | Tj TSTG | -65 | 150 | ℃ | 1 | ||
| Typical thermal resistance junction to lead | RUJL | 15 | ℃/W | Typical | 1 | ||
| Typical thermal resistance junction to ambient | RUJA | 75 | ℃/W | Typical | 1 | ||
| Reverse stand-off voltage | VRMW | 43 | V | Unidirectional (SMDJ43A) | 2 |
CAD (KiCad official)
- Symbol:
SMDJ43A - Footprint:
Diode_SMD:D_SMC - 3D model: DO-214AB(SMC) (KiCad packages3D, STEP)
- 3D model files:
smdj43a-etched.step/smdj43a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smdj43a.step/smdj43a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TWGMC datasheet (4 pp, sha256
07b07d63a3938379, retrieved 2026-10-14, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).
# SMDJ43A
**TWGMC** · ESD And Surge Protection (TVS/ESD) · DO-214AB(SMC)
SMDJ43A from TWGMC, in a DO-214AB(SMC). 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 | Cathode | passive | Cathode terminal of the unidirectional SMDJ43A TVS diode, which is the polarity-marked side of the device as listed in the datasheet PINNING table. |
| 2 | Anode | passive | Anode terminal of the unidirectional SMDJ43A TVS diode, opposite the cathode, as listed in the datasheet PINNING table. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TWGMC |
| Package | DO-214AB(SMC) |
| 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 (min) | VBR | 47.8 | | | V | Test current IT = 1 mA | 2 |
| Breakdown voltage (max) | VBR | | | 52.8 | V | Test current IT = 1 mA | 2 |
| Max. clamp voltage | VC | | | 69.4 | V | VC @ IPP = 43.2 A | 2 |
| Max. peak pulse current | IPP | | | 43.2 | A | | 2 |
| Max. reverse leakage current | IR | | | 2 | uA | IR@VR | 2 |
| Peak pulse power dissipation | PPPM | | | 3000 | W | TA=25℃, 10x1000 us waveform (Fig.1) (Note 1, 2) | 1 |
| Power dissipation on infinite heat sink | PM(AV) | | | 6.5 | W | TA=50℃ | 1 |
| Peak forward surge current | IFSM | | | 300 | A | 8.3ms single half sine wave (Note 3) | 1 |
| Maximum instantaneous forward voltage | VF | | | 3.5 | V | At 100A, unidirectional only | 1 |
| Operating junction and storage temperature range | Tj TSTG | -65 | | 150 | ℃ | | 1 |
| Typical thermal resistance junction to lead | RUJL | | 15 | | ℃/W | Typical | 1 |
| Typical thermal resistance junction to ambient | RUJA | | 75 | | ℃/W | Typical | 1 |
| Reverse stand-off voltage | VRMW | | 43 | | V | Unidirectional (SMDJ43A) | 2 |
## CAD (KiCad official)
- Symbol: `SMDJ43A`
- Footprint: `Diode_SMD:D_SMC`
- 3D model: DO-214AB(SMC) (KiCad packages3D, STEP)
- 3D model files: `smdj43a-etched.step` / `smdj43a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smdj43a.step` / `smdj43a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [TWGMC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603035731611045888) (4 pp, sha256 `07b07d63a3938379`, retrieved 2026-10-14, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/smdj43a-datasheet.pdf)