component
1KSMB47CA
Public Made by Adomby adom
Littelfuse TVS, 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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1KSMB47CA
Littelfuse · TVS · DO-214AA
1KSMB47CA 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 (1KSMB47CA, bidirectional) | VBR | 44.7 | 49.4 | V | @ IT = 1 mA (Test Current column) | 2 | |
| Maximum clamping voltage | VC | 64.8 | V | @ Ipp 15.4 A | 2 | ||
| Maximum peak pulse current | Ipp | 15.4 | A | 2 | |||
| Maximum reverse leakage current | IR | 1 | µA | @ VR | 2 | ||
| Reverse stand-off voltage | VR | 40.2 | V | Stand-off voltage: maximum voltage that can be applied without operation (definition p.3) | 2 | ||
| VBR voltage tolerance (parts with A suffix) | -5 | 5 | % | 5% VBR voltage tolerance per part marking system; 'A' parts | 6 | ||
| VBR temperature coefficient | αT | 0.1 | % | Typical; VBR@TJ = VBR@25°C x (1+αT x (TJ-25)) | 1 | ||
| Peak pulse power dissipation | PPPM | 1000 | W | TA=25°C, 10/1000µs waveform (Fig.2), Notes 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 | 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:
1KSMB47CA - Footprint:
Diode_SMD:D_SMB - 3D model: DO-214AA (KiCad packages3D, STEP)
- 3D model files:
1ksmb47ca-etched.step/1ksmb47ca-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1ksmb47ca.step/1ksmb47ca.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
5456789e35da8ee5, retrieved 2026-10-30, 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).
# 1KSMB47CA
**Littelfuse** · TVS · DO-214AA
1KSMB47CA 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 (1KSMB47CA, bidirectional) | VBR | 44.7 | | 49.4 | V | @ IT = 1 mA (Test Current column) | 2 |
| Maximum clamping voltage | VC | | | 64.8 | V | @ Ipp 15.4 A | 2 |
| Maximum peak pulse current | Ipp | | | 15.4 | A | | 2 |
| Maximum reverse leakage current | IR | | | 1 | µA | @ VR | 2 |
| Reverse stand-off voltage | VR | | | 40.2 | V | Stand-off voltage: maximum voltage that can be applied without operation (definition p.3) | 2 |
| VBR voltage tolerance (parts with A suffix) | | -5 | | 5 | % | 5% VBR voltage tolerance per part marking system; 'A' parts | 6 |
| VBR temperature coefficient | αT | | 0.1 | | % | Typical; VBR@TJ = VBR@25°C x (1+αT x (TJ-25)) | 1 |
| Peak pulse power dissipation | PPPM | | | 1000 | W | TA=25°C, 10/1000µs waveform (Fig.2), Notes 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 | 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: `1KSMB47CA`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: DO-214AA (KiCad packages3D, STEP)
- 3D model files: `1ksmb47ca-etched.step` / `1ksmb47ca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1ksmb47ca.step` / `1ksmb47ca.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Littelfuse datasheet](docs/1ksmb47ca-datasheet.pdf) (6 pp, sha256 `5456789e35da8ee5`, retrieved 2026-10-30, 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/1ksmb47ca-datasheet.pdf)