# 1.5KE56A

**RUILON Shenzhen Ruilongyuan Elec** · ESD And Surge Protection (TVS/ESD) · DO-201

1.5KE56A from RUILON Shenzhen Ruilongyuan Elec, 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 | RUILON Shenzhen Ruilongyuan Elec |
| 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 (1.5KE56A, unidirectional) | VBR | 53.2 |  | 58.8 | V | @ IT = 1 mA | 2 |
| Max clamping voltage (10/1000µs) | VC |  |  | 77 | V | @ IPP = 19.5 A, 10/1000µs waveform | 2 |
| Max peak pulse current (10/1000µs) | IPP |  |  | 19.5 | A | 10/1000µs waveform | 2 |
| Reverse leakage current | IR |  |  | 1 | µA | @ VRWM = 47.8 V | 2 |
| Peak pulse power dissipation | PPP |  |  | 1500 | W | 10x1000µs, non-repetitive (Note 1) | 1 |
| Steady state power dissipation | PD |  |  | 5 | W | TL = 75°C, infinite heat sink (Fig. 6) | 1 |
| Peak forward surge current | IFSM |  |  | 100 | A | 8.3ms single half sine-wave, unidirectional only (Note 2) | 1 |
| Operating junction and storage temperature range | TJ,TSTG | -55 |  | 150 | °C |  | 1 |
| Reverse stand-off voltage | VRWM |  | 47.8 |  | V |  | 2 |
| Test current for VBR | IT |  | 1 |  | mA | Test current for VBR | 2 |

## CAD (KiCad official)

- Symbol: `1.5KE56A`
- 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:** [RUILON Shenzhen Ruilongyuan Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588887210158395392) (6 pp, sha256 `90967e81fb1cb38e`, retrieved 2026-10-14, 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/1-5ke56a-datasheet.pdf)