component
1.5KE27A-B
Public Made by Adomby adom
Littelfuse ESD And Surge Protection (TVS/ESD), DO-201. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdown1.5KE27A-B
Littelfuse · ESD And Surge Protection (TVS/ESD) · DO-201
1.5KE27A-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 | Cathode | passive | The cathode is the terminal marked by the color band on the DO-201 body, which applies to uni-directional products only. Its reverse stand-off voltage is VR 23.10 V min and its breakdown voltage is 25.70 V typ at 1 mA for the 1.5KE27A. |
| 2 | Anode | passive | The anode is the terminal opposite the cathode band on the uni-directional 1.5KE27A. The device clamps at 37.5 V maximum at 40.5 A peak pulse current, with a 1500 W peak pulse power rating at 10/1000 µs. |
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 1.5KE27A) | VBR | 25.7 | 28.4 | V | @ IT = 1 mA | 2 | |
| Maximum Clamping Voltage | VC | 37.5 | V | @ Ipp, row value Ipp = 40.5 A | 2 | ||
| Maximum Peak Pulse Current | Ipp | 40.5 | A | 2 | |||
| Maximum Reverse Leakage Current | IR | 1 | µA | @ VR = 23.10 V | 2 | ||
| Peak Pulse Power Dissipation, single die parts | PPPM | 1500 | W | 10/1000µs test waveform (Note 1) | 1 | ||
| Peak Forward Surge Current | IFSM | 200 | A | 8.3 ms single half sine wave, unidirectional only (Note 2) | 1 | ||
| Maximum Instantaneous Forward Voltage, single die | VF | 3.5 | V | at 100 A, unidirectional only (Note 3) | 1 | ||
| Steady State Power Dissipation | PD | 6.5 | W | infinite heat sink at TL = 75 ºC | 1 | ||
| Operating Junction and Storage Temperature Range | TJ, TSTG | -55 | 175 | °C | 1 | ||
| Typical Thermal Resistance Junction to Lead | RθJL | 15 | °C/W | 1 | |||
| Typical Thermal Resistance Junction to Ambient | RθJA | 75 | °C/W | 1 | |||
| VBR Temperature Coefficient | αT | 0.1 | % | typical; VBR@TJ = VBR@25°C x (1+αT x (TJ - 25)) | 1 |
CAD (KiCad official)
- Symbol:
1.5KE27A-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
6109fc9061bdfd07, retrieved 2026-10-15, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(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).