component
1.5KE540A
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.
main
1.5KE540A
Littelfuse · ESD And Surge Protection (TVS/ESD) · DO-201
1.5KE540A 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage (uni-directional, type A, 5% tolerance) | VBR | 513 | 567 | V | @ IT = 1 mA | 2 | |
| Maximum Clamping Voltage | VC | 740 | V | @ Ipp | 2 | ||
| Maximum Peak Pulse Current | Ipp | 2.8 | A | 2 | |||
| Maximum Reverse Leakage Current | IR | 1 | µA | @ VR (VR = 460.00 V in the same row) | 2 | ||
| Maximum Forward Voltage (stacked-die part, 3.5/5.0 V column value 5.0) | VF | 5 | V | at 100 A, unidirectional only; stacked-die (*) part | 1 | ||
| Peak Pulse Power Dissipation, 10/1000 µs (stacked-die part) | PPPM | 2000 | W | 10/1000 µs waveform, Note 1; stacked-die (*) part | 1 | ||
| Steady State Power Dissipation on Infinite Heat Sink | PD | 6.5 | W | at TL = 75 ºC | 1 | ||
| Peak Forward Surge Current (unidirectional only) | IFSM | 200 | A | 8.3 ms single half sine wave or equivalent square wave, Note 2 | 1 | ||
| Operating Junction and Storage Temperature Range | TJ, TSTG | -55 | 175 | °C | 1 | ||
| Typical Thermal Resistance Junction to Lead | RθJL | 15 | °C/W | typical | 1 | ||
| Typical Thermal Resistance Junction to Ambient | RθJA | 75 | °C/W | typical | 1 | ||
| Breakdown Voltage Tolerance (type code A, uni-directional) | VBR | -5 | 5 | % | 5% VBR voltage tolerance per type code A | 6 | |
| Temperature Coefficient of VBR | αT | 0.1 | % | VBR(TJ) = VBR@25°C x (1+αT x (TJ - 25)) | 1 | ||
| Reverse Stand-off Voltage | VR | 460 | V | 2 |
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 • Halogen free and RoHS | 1 |
CAD (KiCad official)
- Symbol:
1.5KE540A - 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 2026-10-16, 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).
# 1.5KE540A
**Littelfuse** · ESD And Surge Protection (TVS/ESD) · DO-201
1.5KE540A 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage (uni-directional, type A, 5% tolerance) | VBR | 513 | | 567 | V | @ IT = 1 mA | 2 |
| Maximum Clamping Voltage | VC | | | 740 | V | @ Ipp | 2 |
| Maximum Peak Pulse Current | Ipp | | | 2.8 | A | | 2 |
| Maximum Reverse Leakage Current | IR | | | 1 | µA | @ VR (VR = 460.00 V in the same row) | 2 |
| Maximum Forward Voltage (stacked-die part, 3.5/5.0 V column value 5.0) | VF | | | 5 | V | at 100 A, unidirectional only; stacked-die (*) part | 1 |
| Peak Pulse Power Dissipation, 10/1000 µs (stacked-die part) | PPPM | | | 2000 | W | 10/1000 µs waveform, Note 1; stacked-die (*) part | 1 |
| Steady State Power Dissipation on Infinite Heat Sink | PD | | | 6.5 | W | at TL = 75 ºC | 1 |
| Peak Forward Surge Current (unidirectional only) | IFSM | | | 200 | A | 8.3 ms single half sine wave or equivalent square wave, Note 2 | 1 |
| Operating Junction and Storage Temperature Range | TJ, TSTG | -55 | | 175 | °C | | 1 |
| Typical Thermal Resistance Junction to Lead | RθJL | | 15 | | °C/W | typical | 1 |
| Typical Thermal Resistance Junction to Ambient | RθJA | | 75 | | °C/W | typical | 1 |
| Breakdown Voltage Tolerance (type code A, uni-directional) | VBR | -5 | | 5 | % | 5% VBR voltage tolerance per type code A | 6 |
| Temperature Coefficient of VBR | αT | | 0.1 | | % | VBR(TJ) = VBR@25°C x (1+αT x (TJ - 25)) | 1 |
| Reverse Stand-off Voltage | VR | | 460 | | V | | 2 |
## 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 • Halogen free and RoHS | 1 |
## CAD (KiCad official)
- Symbol: `1.5KE540A`
- 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/8588938487043133440) (6 pp, sha256 `4290e23a327d9203`, 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/1-5ke540a-datasheet.pdf)