# KESD0805

**KUU** · Varistors · 0805

KESD0805 from KUU, in a 0805. 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 | 1 | passive | Terminal electrode (Ag/Ni/Sn) of the bidirectional chip varistor, interchangeable with the other terminal, 27 VDC / 20 VAC max working voltage, 36 V ±10% varistor voltage at 1 mA, 60 V max clamping at 8/20 µs 1 A. |
| 2 | 2 | passive | Terminal electrode (Ag/Ni/Sn) of the bidirectional chip varistor, interchangeable with the other terminal, 100 A peak current (8/20 µs), 0.3 J energy (10/1000 µs), 210 pF typical at 1 MHz. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KUU |
| Package | 0805 |
| 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 |
|---|---|---|---|---|---|---|---|
| Max. working voltage (DC) | VDC |  |  | 27 | V |  | 1 |
| Max. working voltage (AC) | VAC |  |  | 20 | V |  | 1 |
| Max. clamping voltage | Vc |  |  | 60 | V | 8/20μs 1A | 1 |
| Peak current | Ip |  |  | 100 | A | 8/20μs | 1 |
| Energy | WT |  |  | 0.3 | J | 10/1000μs | 1 |
| Varistor voltage tolerance | VB | -10 |  | 10 | % | @1mA DC | 1 |
| Varistor voltage | VB |  | 36 |  | V | @1mA DC | 1 |
| Typical capacitance | Cp |  | 210 |  | pF | @1MHz | 1 |

## 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 | Terminal Electrode (Ag/Ni/Sn three layers) | 1 |

## CAD (KiCad official)

- Symbol: `KESD0805`
- Footprint: `Resistor_SMD:R_0805_2012Metric`
- 3D model: 0805 (KiCad packages3D, STEP)
- 3D model files: `kesd0805-etched.step` / `kesd0805-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kesd0805.step` / `kesd0805.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [KUU datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589836787637260288) (4 pp, sha256 `d3d1f6de5595f406`, retrieved 2026-10-18, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/kesd0805-datasheet.pdf)