component
1KSMB120CA
Public Made by Adomby adom
Littelfuse ESD And Surge Protection (TVS/ESD), DO-214AA(SMBJ). Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
main
1KSMB120CA
Littelfuse · ESD And Surge Protection (TVS/ESD) · DO-214AA(SMBJ)
1KSMB120CA from Littelfuse, in a DO-214AA(SMBJ). 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(SMBJ) |
| 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/max) | VBR | 114 | 126 | V | @ IT 1 mA | 2 | |
| Maximum Clamping Voltage | VC | 165 | V | @ Ipp 6.1 A | 2 | ||
| Maximum Reverse Leakage Current | IR | 1 | µA | @ VR | 2 | ||
| Maximum Peak Pulse Current | Ipp | 6.1 | A | 2 | |||
| Reverse Stand-off Voltage | VR | 102 | V | 2 | |||
| Peak Pulse Power Dissipation at TA=25°C, 10/1000µs waveform | PPPM | 1000 | W | TA=25°C, 10/1000µs waveform (Note 1, 2) | 1 | ||
| Power Dissipation on Infinite Heat Sink | PD | 5 | W | TL=50°C | 1 | ||
| Operating Temperature Range | TJ | -65 | 150 | °C | 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; mounted on 0.2x0.2in (5.0x5.0mm) copper pad area per terminal (Note 2) | 1 | ||
| VBR Temperature Coefficient | αT | 0.1 | % | Typical; VBR@TJ = VBR@25°C x (1+αT x (TJ-25)) | 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 | • Matte tin lead-free Plated • Available in breakdown | 1 |
CAD (KiCad official)
- Symbol:
1KSMB120CA - Footprint:
Diode_SMD:D_SMB - 3D model: DO-214AA(SMBJ) (KiCad packages3D, STEP)
- 3D model files:
1ksmb120ca-etched.step/1ksmb120ca-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1ksmb120ca.step/1ksmb120ca.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
5456789e35da8ee5, 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).
# 1KSMB120CA
**Littelfuse** · ESD And Surge Protection (TVS/ESD) · DO-214AA(SMBJ)
1KSMB120CA from Littelfuse, in a DO-214AA(SMBJ). 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(SMBJ) |
| 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/max) | VBR | 114 | | 126 | V | @ IT 1 mA | 2 |
| Maximum Clamping Voltage | VC | | | 165 | V | @ Ipp 6.1 A | 2 |
| Maximum Reverse Leakage Current | IR | | | 1 | µA | @ VR | 2 |
| Maximum Peak Pulse Current | Ipp | | | 6.1 | A | | 2 |
| Reverse Stand-off Voltage | VR | | | 102 | V | | 2 |
| Peak Pulse Power Dissipation at TA=25°C, 10/1000µs waveform | PPPM | | | 1000 | W | TA=25°C, 10/1000µs waveform (Note 1, 2) | 1 |
| Power Dissipation on Infinite Heat Sink | PD | | | 5 | W | TL=50°C | 1 |
| Operating Temperature Range | TJ | -65 | | 150 | °C | | 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; mounted on 0.2x0.2in (5.0x5.0mm) copper pad area per terminal (Note 2) | 1 |
| VBR Temperature Coefficient | αT | | 0.1 | | % | Typical; VBR@TJ = VBR@25°C x (1+αT x (TJ-25)) | 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 | • Matte tin lead-free Plated • Available in breakdown | 1 |
## CAD (KiCad official)
- Symbol: `1KSMB120CA`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: DO-214AA(SMBJ) (KiCad packages3D, STEP)
- 3D model files: `1ksmb120ca-etched.step` / `1ksmb120ca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1ksmb120ca.step` / `1ksmb120ca.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/8588939097821470720) (6 pp, sha256 `5456789e35da8ee5`, 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/1ksmb120ca-datasheet.pdf)