component
SMBJ40A
Public Made by Adomby adom
BORN TVS, DO-214AA(SMB). 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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SMBJ40A
BORN · TVS · DO-214AA(SMB)
SMBJ40A from BORN, 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: 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 | 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage (VBR@IT) | VBR | 44.4 | 49.1 | V | @ IT = 1 mA | 3 | |
| Maximum Clamping Voltage (VC @ Ipp) | VC | 64.5 | V | @ Ipp = 9.3 A | 3 | ||
| Maximum Peak Pulse Current | Ipp | 9.3 | A | 3 | |||
| Maximum Reverse Leakage Current | IR | 1 | uA | @ VR = 40 V | 3 | ||
| Reverse Stand-Off Voltage (Uni) | VR | 40 | V | 3 | |||
| Peak Pulse Power Dissipation | PPPM | 600 | W | Notes 1,2: non-repetitive 10/1000 us waveform; mounted on 5x5 mm copper pad per terminal | 2 | ||
| Steady State Power Dissipation | PD | 5 | W | Note 3: infinite heatsink at TA = 50 ◦C | 2 | ||
| Peak Forward Surge Current | IFSM | 100 | A | Note 4: 8.3 ms single half sine wave or equivalent square wave | 2 | ||
| Maximum Instantaneous Forward Voltage | VFM | 3.5 | V | at 50 A; unidirectional only, VBR ≤ 200 V (Note 5) | 2 | ||
| Operating Temperature Range | TJ | -55 | 150 | ◦C | 2 | ||
| Storage Temperature Range | TSTG | -55 | 150 | ◦C | 2 | ||
| Typical Thermal Resistance Junction to Lead | RθJL | 20 | ◦C/W | Typical | 2 | ||
| Typical Thermal Resistance Junction to Ambient | RθJA | 100 | ◦C/W | Typical | 2 |
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:
SMBJ40A - Footprint:
Diode_SMD:D_SMB - 3D model: DO-214AA(SMB) (KiCad packages3D, STEP)
- 3D model files:
smbj40a-etched.step/smbj40a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj40a.step/smbj40a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BORN datasheet (7 pp, sha256
714b9a8b6a4ec525, 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).
# SMBJ40A
**BORN** · TVS · DO-214AA(SMB)
SMBJ40A from BORN, 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: 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 | 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage (VBR@IT) | VBR | 44.4 | | 49.1 | V | @ IT = 1 mA | 3 |
| Maximum Clamping Voltage (VC @ Ipp) | VC | | | 64.5 | V | @ Ipp = 9.3 A | 3 |
| Maximum Peak Pulse Current | Ipp | | | 9.3 | A | | 3 |
| Maximum Reverse Leakage Current | IR | | | 1 | uA | @ VR = 40 V | 3 |
| Reverse Stand-Off Voltage (Uni) | VR | | | 40 | V | | 3 |
| Peak Pulse Power Dissipation | PPPM | | | 600 | W | Notes 1,2: non-repetitive 10/1000 us waveform; mounted on 5x5 mm copper pad per terminal | 2 |
| Steady State Power Dissipation | PD | | | 5 | W | Note 3: infinite heatsink at TA = 50 ◦C | 2 |
| Peak Forward Surge Current | IFSM | | | 100 | A | Note 4: 8.3 ms single half sine wave or equivalent square wave | 2 |
| Maximum Instantaneous Forward Voltage | VFM | | | 3.5 | V | at 50 A; unidirectional only, VBR ≤ 200 V (Note 5) | 2 |
| Operating Temperature Range | TJ | -55 | | 150 | ◦C | | 2 |
| Storage Temperature Range | TSTG | -55 | | 150 | ◦C | | 2 |
| Typical Thermal Resistance Junction to Lead | RθJL | | 20 | | ◦C/W | Typical | 2 |
| Typical Thermal Resistance Junction to Ambient | RθJA | | 100 | | ◦C/W | Typical | 2 |
## 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: `SMBJ40A`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: DO-214AA(SMB) (KiCad packages3D, STEP)
- 3D model files: `smbj40a-etched.step` / `smbj40a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smbj40a.step` / `smbj40a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [BORN datasheet](docs/smbj40a-datasheet.pdf) (7 pp, sha256 `714b9a8b6a4ec525`, 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/smbj40a-datasheet.pdf)