# RL0402E018M300K

**RUILON Shenzhen Ruilongyuan Elec** · Varistors · 0402

RL0402E018M300K from RUILON Shenzhen Ruilongyuan Elec, in a 0402. 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 | Terminal 1 | passive | Electrode L2 of the non-polar varistor ESD suppressor, connected to the protected line, with 18 V max operating voltage (VDC) and 50 V clamping voltage. |
| 2 | Terminal 2 | passive | Electrode L3 of the non-polar varistor ESD suppressor, connected to ground or the return reference, with 3 pF capacitance at 1 MHz and 10 uA max leakage current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | RUILON Shenzhen Ruilongyuan Elec |
| Package | 0402 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `RL0402E018M300K`
- Footprint: `Resistor_SMD:R_0402_1005Metric`
- 3D model: 0402 (KiCad packages3D, STEP)
- 3D model files: `rl0402e018m300k-etched.step` / `rl0402e018m300k-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rl0402e018m300k.step` / `rl0402e018m300k.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [RUILON Shenzhen Ruilongyuan Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586172512745373696) (6 pp, sha256 `9d9b1a1c2c21ead7`, retrieved 2026-10-09, 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/rl0402e018m300k-datasheet.pdf)