component
1.5KE91A-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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1.5KE91A-B
Littelfuse · ESD And Surge Protection (TVS/ESD) · DO-201
1.5KE91A-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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage VBR | VBR | 86.5 | 95.5 | V | @ IT = 1 mA | 2 | |
| Maximum Clamping Voltage | VC | 125 | V | @ Ipp = 12.2 A | 2 | ||
| Maximum Peak Pulse Current | Ipp | 12.2 | A | 2 | |||
| Maximum Reverse Leakage Current | IR | 1 | µA | @ VR = 77.80 V | 2 | ||
| VBR voltage tolerance (Type A, uni-directional) | -5 | 5 | % | Uni-directional type A; 5% VBR voltage tolerance per part numbering system | 6 | ||
| Peak Pulse Power Dissipation (single die) | PPPM | 1500 | W | 10/1000µs test waveform (Fig.4), Note 1 | 1 | ||
| Steady State Power Dissipation on Infinite Heat Sink | PD | 6.5 | W | at TL = 75ºC | 1 | ||
| Peak Forward Surge Current | IFSM | 200 | A | 8.3ms single half sine wave, unidirectional only (Note 2) | 1 | ||
| Maximum Instantaneous Forward Voltage | VF | 3.5 | V | at 100A, unidirectional only; single-die value (Note 3) | 1 | ||
| Operating Junction and Storage Temperature Range | TJ, TSTG | -55 | 175 | °C | 1 | ||
| Reverse Stand-off Voltage | VR | 77.8 | V | 2 | |||
| Temperature Coefficient of VBR | αT | 0.1 | % | Typical; VBR @ TJ = VBR @ 25°C x (1+αT x (TJ - 25)) | 1 | ||
| Typical Thermal Resistance Junction to Lead | RθJL | 15 | °C/W | 1 | |||
| Typical Thermal Resistance Junction to Ambient | RθJA | 75 | °C/W | 1 |
CAD (KiCad official)
- Symbol:
1.5KE91A-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).
# 1.5KE91A-B
**Littelfuse** · ESD And Surge Protection (TVS/ESD) · DO-201
1.5KE91A-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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage VBR | VBR | 86.5 | | 95.5 | V | @ IT = 1 mA | 2 |
| Maximum Clamping Voltage | VC | | | 125 | V | @ Ipp = 12.2 A | 2 |
| Maximum Peak Pulse Current | Ipp | | | 12.2 | A | | 2 |
| Maximum Reverse Leakage Current | IR | | | 1 | µA | @ VR = 77.80 V | 2 |
| VBR voltage tolerance (Type A, uni-directional) | | -5 | | 5 | % | Uni-directional type A; 5% VBR voltage tolerance per part numbering system | 6 |
| Peak Pulse Power Dissipation (single die) | PPPM | | | 1500 | W | 10/1000µs test waveform (Fig.4), Note 1 | 1 |
| Steady State Power Dissipation on Infinite Heat Sink | PD | | | 6.5 | W | at TL = 75ºC | 1 |
| Peak Forward Surge Current | IFSM | | | 200 | A | 8.3ms single half sine wave, unidirectional only (Note 2) | 1 |
| Maximum Instantaneous Forward Voltage | VF | | | 3.5 | V | at 100A, unidirectional only; single-die value (Note 3) | 1 |
| Operating Junction and Storage Temperature Range | TJ, TSTG | -55 | | 175 | °C | | 1 |
| Reverse Stand-off Voltage | VR | | 77.8 | | V | | 2 |
| Temperature Coefficient of VBR | αT | | 0.1 | | % | Typical; VBR @ TJ = VBR @ 25°C x (1+αT x (TJ - 25)) | 1 |
| Typical Thermal Resistance Junction to Lead | RθJL | | 15 | | °C/W | | 1 |
| Typical Thermal Resistance Junction to Ambient | RθJA | | 75 | | °C/W | | 1 |
## CAD (KiCad official)
- Symbol: `1.5KE91A-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/8589852515413368832) (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/1-5ke91a-b-datasheet.pdf)