component
TPSMB56A
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Littelfuse ESD And Surge Protection (TVS/ESD), 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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TPSMB56A
Littelfuse · ESD And Surge Protection (TVS/ESD) · DO-214AA
TPSMB56A from Littelfuse, in a 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 | 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 | Littelfuse |
| Package | DO-214AA |
| 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 (minimum) at IT | VBR | 53.2 | V | IT = 1 mA | 2 | ||
| Breakdown Voltage VBR (maximum) at IT | VBR | 58.8 | V | IT = 1 mA | 2 | ||
| Maximum Clamping Voltage VC | VC | 77 | V | @ Ipp = 7.9 A | 2 | ||
| Maximum Peak Pulse Current | Ipp | 7.9 | A | 2 | |||
| Maximum Reverse Leakage Current | IR | 1 | µA | @ VR = 47.80 V | 2 | ||
| Maximum Temperature coefficient of VBR | 0.101 | %/C | 2 | ||||
| Reverse Stand-off Voltage | VR | 47.8 | V | Maximum voltage that can be applied to the TVS without operation (definition, page 3) | 2 | ||
| Peak Pulse Power Dissipation | PPPM | 600 | W | 10/1000µs waveform (Fig.1) (Note 1), (Note 2) | 1 | ||
| Power Dissipation on infinite heat sink | PM(AV) | 5 | W | TL = 50°C | 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, unidirectional only (Note 4); VF < 3.5V for Vbr < 300V | 1 | ||
| Operating Junction Temperature Range | TJ | -65 | 175 | °C | VBR ≤ 91V | 1 | |
| Storage Temperature Range | TSTG | -65 | 175 | °C | 1 | ||
| Typical Thermal Resistance Junction to Lead | RθJL | 20 | °C/W | Typical | 1 | ||
| Typical Thermal Resistance Junction to Ambient | RθJA | 100 | °C/W | Typical | 1 |
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 | 260°C/10 seconds at terminals ■ Matte tin lead-free plated | 1 |
CAD (KiCad official)
- Symbol:
TPSMB56A - Footprint:
Diode_SMD:D_SMB - 3D model: DO-214AA (KiCad packages3D, STEP)
- 3D model files:
tpsmb56a-etched.step/tpsmb56a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tpsmb56a.step/tpsmb56a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
8cc50e1afb0bea8d, retrieved 2026-10-16, 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).
# TPSMB56A
**Littelfuse** · ESD And Surge Protection (TVS/ESD) · DO-214AA
TPSMB56A from Littelfuse, in a 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 | 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 | Littelfuse |
| Package | DO-214AA |
| 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 (minimum) at IT | VBR | 53.2 | | | V | IT = 1 mA | 2 |
| Breakdown Voltage VBR (maximum) at IT | VBR | | | 58.8 | V | IT = 1 mA | 2 |
| Maximum Clamping Voltage VC | VC | | | 77 | V | @ Ipp = 7.9 A | 2 |
| Maximum Peak Pulse Current | Ipp | | | 7.9 | A | | 2 |
| Maximum Reverse Leakage Current | IR | | | 1 | µA | @ VR = 47.80 V | 2 |
| Maximum Temperature coefficient of VBR | | | | 0.101 | %/C | | 2 |
| Reverse Stand-off Voltage | VR | | | 47.8 | V | Maximum voltage that can be applied to the TVS without operation (definition, page 3) | 2 |
| Peak Pulse Power Dissipation | PPPM | | | 600 | W | 10/1000µs waveform (Fig.1) (Note 1), (Note 2) | 1 |
| Power Dissipation on infinite heat sink | PM(AV) | | | 5 | W | TL = 50°C | 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, unidirectional only (Note 4); VF < 3.5V for Vbr < 300V | 1 |
| Operating Junction Temperature Range | TJ | -65 | | 175 | °C | VBR ≤ 91V | 1 |
| Storage Temperature Range | TSTG | -65 | | 175 | °C | | 1 |
| Typical Thermal Resistance Junction to Lead | RθJL | | 20 | | °C/W | Typical | 1 |
| Typical Thermal Resistance Junction to Ambient | RθJA | | 100 | | °C/W | Typical | 1 |
## 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 | 260°C/10 seconds at terminals ■ Matte tin lead-free plated | 1 |
## CAD (KiCad official)
- Symbol: `TPSMB56A`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: DO-214AA (KiCad packages3D, STEP)
- 3D model files: `tpsmb56a-etched.step` / `tpsmb56a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpsmb56a.step` / `tpsmb56a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Littelfuse datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588938347737309184) (6 pp, sha256 `8cc50e1afb0bea8d`, retrieved 2026-10-16, 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/tpsmb56a-datasheet.pdf)