# K0603ESDA-LC

**KUU** · Varistors · 0603

K0603ESDA-LC from KUU, in a 0603. 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 three layers) of the bidirectional ESD varistor, rated 18 V DC max working voltage, 100-160 V varistor voltage at 1 mA, 200 V max clamping, and ESD contact discharge of 8 kV or more. |
| 2 | 2 | passive | Second terminal electrode (Ag/Ni/Sn three layers) of the bidirectional ESD varistor, interchangeable with the other terminal, with 5 uA max leakage at VDC and 0.5-1.5 pF capacitance at 1 MHz, 0.5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KUU |
| Package | 0603 |
| 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 | VDC |  |  | 18 | V |  | 2 |
| Varistor Voltage | V1mA | 100 |  | 160 | V | @1mA DC | 2 |
| Max. Clamping Voltage | Vc |  |  | 200 | V |  | 2 |
| Max. Leakage Current | IL |  |  | 5 | uA | @VDC = 18 V | 2 |
| Capacitance | Cp | 0.5 |  | 1.5 | pF | @1MHz, 0.5V | 2 |
| ESD Contact |  | 8 |  |  | kV |  | 2 |
| Bending: change in varistor voltage | V1mA | -5 |  | 5 | % | Warp 2 mm, speed <0.5 mm/s, duration 10 s | 2 |
| Resistance to soldering heat: change in varistor voltage | V1mA | -10 |  | 10 | % | Solder 260+/-5 C, dip 5+/-1 s | 3 |
| High temp storage: change in varistor voltage | V1mA | -10 |  | 10 | % | 125+/-2 C, 1000+/-24 h | 3 |
| Maximum surge current: change in varistor voltage | V1mA | -10 |  | 10 | % | 8/20 us pulse, 1 hit each polarity, applied at maximum surge current (Ip) | 3 |
| Storage temperature in original packaging |  | -10 |  | 40 | C | Original packaging storage | 4 |
| Storage relative humidity |  |  |  | 70 | %RH | Storage | 4 |
| Max time at max temp (Pb-free reflow) |  |  |  | 10 | s | Pb-free solder paste Sn/Ag/Cu (96.5/3.0/0.5) | 4 |

## 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: `K0603ESDA-LC`
- Footprint: `Resistor_SMD:R_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `k0603esda-lc-etched.step` / `k0603esda-lc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `k0603esda-lc.step` / `k0603esda-lc.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/8590191735184916480) (4 pp, sha256 `718d231e2fa45b2a`, retrieved 2026-10-16, 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/k0603esda-lc-datasheet.pdf)