component
SMBJ51A
Public Made by Adomby adom
Taisko Electrostatic 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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SMBJ51A
Taisko · Electrostatic And Surge Protection (TVS/ESD) · SMB(DO-214AA)
SMBJ51A from Taisko, 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 | 1 | passive | Terminal 1 of an unpolarised fuse; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised fuse; either orientation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Taisko |
| Package | SMB(DO-214AA) |
| Category | TVS/Fuse/Board Level 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 |
|---|---|---|---|---|---|---|---|
| Peak Pulse Power Dissipation | PPPM | 600 | W | 10/1000us waveform, non-repetitive (Note1)(Note2) | 3 | ||
| Peak Forward Surge Current | IFSM | 100 | A | 8.3ms single half sine wave or equivalent square wave, duty cycle=4 per minute max (Note4) | 3 | ||
| Steady State Power Dissipation | PD | 5 | W | Infinite heat sink at TA=50°C (Note3) | 3 | ||
| Maximum Instantaneous Forward Voltage | VFM | 3.5 | V | at 50A; unidirectional only; VFM<3.5V for VBR≤200V (Note5) | 3 | ||
| Breakdown Voltage | VBR | 56.7 | 62.7 | V | @ IT = 1 mA | 4 | |
| Maximum Clamping Voltage | VC | 82.4 | V | @ IPP = 7.3 A | 4 | ||
| Maximum Peak Pulse Current | IPP | 7.3 | A | 4 | |||
| Maximum Reverse Leakage Current | IR | 1 | μA | @ VR = 51 V | 4 | ||
| Operating Temperature Range | TJ | -55 | 150 | °C | 3 | ||
| Storage Temperature Range | TSTG | -55 | 150 | °C | 3 | ||
| Typical Thermal Resistance Junction to Lead | RθJL | 20 | °C/W | 3 | |||
| Typical Thermal Resistance Junction to Ambient | RθJA | 100 | °C/W | 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:
SMBJ51A - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
smbj51a-etched.step/smbj51a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj51a.step/smbj51a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Taisko datasheet (8 pp, sha256
798a573194fecebd, retrieved 2026-10-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarytwo-terminal 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).
# SMBJ51A
**Taisko** · Electrostatic And Surge Protection (TVS/ESD) · SMB(DO-214AA)
SMBJ51A from Taisko, 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 | 1 | passive | Terminal 1 of an unpolarised fuse; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised fuse; either orientation. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Taisko |
| Package | SMB(DO-214AA) |
| Category | TVS/Fuse/Board Level 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 |
|---|---|---|---|---|---|---|---|
| Peak Pulse Power Dissipation | PPPM | | | 600 | W | 10/1000us waveform, non-repetitive (Note1)(Note2) | 3 |
| Peak Forward Surge Current | IFSM | | | 100 | A | 8.3ms single half sine wave or equivalent square wave, duty cycle=4 per minute max (Note4) | 3 |
| Steady State Power Dissipation | PD | | | 5 | W | Infinite heat sink at TA=50°C (Note3) | 3 |
| Maximum Instantaneous Forward Voltage | VFM | | | 3.5 | V | at 50A; unidirectional only; VFM<3.5V for VBR≤200V (Note5) | 3 |
| Breakdown Voltage | VBR | 56.7 | | 62.7 | V | @ IT = 1 mA | 4 |
| Maximum Clamping Voltage | VC | | | 82.4 | V | @ IPP = 7.3 A | 4 |
| Maximum Peak Pulse Current | IPP | | | 7.3 | A | | 4 |
| Maximum Reverse Leakage Current | IR | | | 1 | μA | @ VR = 51 V | 4 |
| Operating Temperature Range | TJ | -55 | | 150 | °C | | 3 |
| Storage Temperature Range | TSTG | -55 | | 150 | °C | | 3 |
| Typical Thermal Resistance Junction to Lead | RθJL | | 20 | | °C/W | | 3 |
| Typical Thermal Resistance Junction to Ambient | RθJA | | 100 | | °C/W | | 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: `SMBJ51A`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files: `smbj51a-etched.step` / `smbj51a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smbj51a.step` / `smbj51a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Taisko datasheet](docs/smbj51a-datasheet.pdf) (8 pp, sha256 `798a573194fecebd`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `two-terminal 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/smbj51a-datasheet.pdf)