component
1.5KE400CA-B
Public Made by Adomby adom
Littelfuse ESD And Surge Protection (TVS/ESD), DO-201. 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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1.5KE400CA-B
Littelfuse · ESD And Surge Protection (TVS/ESD) · DO-201
1.5KE400CA-B from Littelfuse, in a DO-201. 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-201 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse stand-off voltage | VR | 342 | V | 2 | |||
| Breakdown voltage | VBR | 380 | 420 | V | @ IT = 1 mA | 2 | |
| Maximum clamping voltage | VC | 548 | V | @ Ipp = 3.7 A | 2 | ||
| Maximum peak pulse current | Ipp | 3.7 | A | 2 | |||
| Maximum reverse leakage current | IR | 1 | µA | @ VR = 342 V | 2 | ||
| Peak pulse power dissipation, stacked die parts | PPPM | 2000 | W | 10/1000µs test waveform; stacked-die parts (Note 4) | 1 | ||
| Steady state power dissipation on infinite heat sink | PD | 6.5 | W | Infinite heat sink at TL = 75ºC | 1 | ||
| Operating junction and storage temperature range | TJ, TSTG | -55 | 175 | °C | 1 | ||
| Typical thermal resistance junction to lead | RθJL | 15 | °C/W | Junction to lead | 1 | ||
| Typical thermal resistance junction to ambient | RθJA | 75 | °C/W | Junction to ambient | 1 | ||
| VBR voltage tolerance (bi-directional CA type) | VBR | -5 | 5 | % | CA (bi-directional) type; 5% VBR voltage tolerance per part numbering table | 6 | |
| VBR temperature coefficient | αT | 0.1 | % | VBR @ TJ = VBR@25°C x (1+αT x (TJ - 25)) | 1 |
CAD (KiCad official)
- Symbol:
1.5KE400CA-B - Footprint:
Diode_THT:D_DO-201AD_P15.24mm_Horizontal - 3D model: DO-201 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
4290e23a327d9203, retrieved 2026-10-15, 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).
# 1.5KE400CA-B
**Littelfuse** · ESD And Surge Protection (TVS/ESD) · DO-201
1.5KE400CA-B from Littelfuse, in a DO-201. 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-201 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse stand-off voltage | VR | | | 342 | V | | 2 |
| Breakdown voltage | VBR | 380 | | 420 | V | @ IT = 1 mA | 2 |
| Maximum clamping voltage | VC | | | 548 | V | @ Ipp = 3.7 A | 2 |
| Maximum peak pulse current | Ipp | | | 3.7 | A | | 2 |
| Maximum reverse leakage current | IR | | | 1 | µA | @ VR = 342 V | 2 |
| Peak pulse power dissipation, stacked die parts | PPPM | | | 2000 | W | 10/1000µs test waveform; stacked-die parts (Note 4) | 1 |
| Steady state power dissipation on infinite heat sink | PD | | | 6.5 | W | Infinite heat sink at TL = 75ºC | 1 |
| Operating junction and storage temperature range | TJ, TSTG | -55 | | 175 | °C | | 1 |
| Typical thermal resistance junction to lead | RθJL | | 15 | | °C/W | Junction to lead | 1 |
| Typical thermal resistance junction to ambient | RθJA | | 75 | | °C/W | Junction to ambient | 1 |
| VBR voltage tolerance (bi-directional CA type) | VBR | -5 | | 5 | % | CA (bi-directional) type; 5% VBR voltage tolerance per part numbering table | 6 |
| VBR temperature coefficient | αT | | 0.1 | | % | VBR @ TJ = VBR@25°C x (1+αT x (TJ - 25)) | 1 |
## CAD (KiCad official)
- Symbol: `1.5KE400CA-B`
- Footprint: `Diode_THT:D_DO-201AD_P15.24mm_Horizontal`
- 3D model: DO-201 (KiCad packages3D, STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Littelfuse datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589855222316101632) (6 pp, sha256 `4290e23a327d9203`, retrieved 2026-10-15, 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/1-5ke400ca-b-datasheet.pdf)