component
SMFJ43A
Public Made by Adomby adom
BORN ESD And Surge Protection (TVS/ESD), SOD-123F. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
main
SMFJ43A
BORN · ESD And Surge Protection (TVS/ESD) · SOD-123F
SMFJ43A from BORN, in a SOD-123F. 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 | SOD-123F |
| 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 | VBR | 47.8 | 52.8 | V | @ IT = 1 mA | 3 | |
| Maximum Clamping Voltage | VC | 69.4 | V | @ Ipp = 2.9 A | 3 | ||
| Maximum Peak Pulse Current | Ipp | 2.9 | A | 3 | |||
| Maximum Reverse Leakage Current | IR | 1 | uA | @ VR = 43 V | 3 | ||
| Peak Pulse Power Dissipation | PPPM | 200 | W | Note 1,2: non-repetitive 10/1000us waveform | 2 | ||
| Steady State Power Dissipation | PD | 1 | W | Note 3: infinite heat sink at TA = 50°C | 2 | ||
| Peak Forward Surge Current | IFSM | 20 | A | Note 4: 8.3ms single half sine wave or equivalent square wave, duty cycle 4 per minute max | 2 | ||
| Maximum Instantaneous Forward Voltage | VFM | 3.5 | V | at 10A; Note 5: unidirectional only | 2 | ||
| Operating Junction Temperature Range | TJ | -55 | 150 | °C | 2 | ||
| Storage Temperature Range | TSTG | -55 | 150 | °C | 2 | ||
| Typical Thermal Resistance Junction to Lead | RθJL | 100 | °C/W | 2 | |||
| Typical Thermal Resistance Junction to Ambient | RθJA | 220 | °C/W | 2 | |||
| Reverse Stand-Off Voltage (Unidirectional) | VR | 43 | V | 3 |
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 | tin | • Lead Finish: Matte Tin • Case Material: Epoxy Molding Compound | 1 |
CAD (KiCad official)
- Symbol:
SMFJ43A - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123F (KiCad packages3D, STEP)
- 3D model files:
smfj43a-etched.step/smfj43a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smfj43a.step/smfj43a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BORN datasheet (7 pp, sha256
dd8422b2bd24ae70, retrieved 2026-10-22, 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).
# SMFJ43A
**BORN** · ESD And Surge Protection (TVS/ESD) · SOD-123F
SMFJ43A from BORN, in a SOD-123F. 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 | SOD-123F |
| 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 | VBR | 47.8 | | 52.8 | V | @ IT = 1 mA | 3 |
| Maximum Clamping Voltage | VC | | | 69.4 | V | @ Ipp = 2.9 A | 3 |
| Maximum Peak Pulse Current | Ipp | | | 2.9 | A | | 3 |
| Maximum Reverse Leakage Current | IR | | | 1 | uA | @ VR = 43 V | 3 |
| Peak Pulse Power Dissipation | PPPM | | | 200 | W | Note 1,2: non-repetitive 10/1000us waveform | 2 |
| Steady State Power Dissipation | PD | | | 1 | W | Note 3: infinite heat sink at TA = 50°C | 2 |
| Peak Forward Surge Current | IFSM | | | 20 | A | Note 4: 8.3ms single half sine wave or equivalent square wave, duty cycle 4 per minute max | 2 |
| Maximum Instantaneous Forward Voltage | VFM | | | 3.5 | V | at 10A; Note 5: unidirectional only | 2 |
| Operating Junction Temperature Range | TJ | -55 | | 150 | °C | | 2 |
| Storage Temperature Range | TSTG | -55 | | 150 | °C | | 2 |
| Typical Thermal Resistance Junction to Lead | RθJL | | 100 | | °C/W | | 2 |
| Typical Thermal Resistance Junction to Ambient | RθJA | | 220 | | °C/W | | 2 |
| Reverse Stand-Off Voltage (Unidirectional) | VR | | 43 | | V | | 3 |
## 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 | | tin | • Lead Finish: Matte Tin • Case Material: Epoxy Molding Compound | 1 |
## CAD (KiCad official)
- Symbol: `SMFJ43A`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123F (KiCad packages3D, STEP)
- 3D model files: `smfj43a-etched.step` / `smfj43a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smfj43a.step` / `smfj43a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [BORN datasheet](docs/smfj43a-datasheet.pdf) (7 pp, sha256 `dd8422b2bd24ae70`, retrieved 2026-10-22, 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/smfj43a-datasheet.pdf)