# 1.5KE250A

**DOWO** · ESD And Surge Protection (TVS/ESD) · DO-201

1.5KE250A from DOWO, 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 lead, marked by the color band on the DO-201 body; the 1.5KE250A is unidirectional with VBR 237.5 to 262.5 V at 1 mA and VRWM 214 V. |
| 2 | A | passive | Anode lead, at the end opposite the color band; the 1.5KE250A has a maximum clamping voltage of 344 V at IPP 4.36 A and a 1500 W 10/1000 µs peak pulse power rating. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | DOWO |
| Package | DO-201 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `1.5KE250A`
- 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:** [DOWO datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588891151629209600) (4 pp, sha256 `332c6c4e0f3105ca`, retrieved 2026-10-13, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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).

[Datasheet PDF](docs/1-5ke250a-datasheet.pdf)