# RL0603A300K

**RUILON Shenzhen Ruilongyuan Elec** · Varistors · 0603

RL0603A300K from RUILON Shenzhen Ruilongyuan Elec, 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 | Bidirectional, symmetrical varistor terminal (RL0603A300K: varistor voltage 26.4~33 V at 1 mA, max 22 Vdc / 16 Vac, max clamping 63 V at 30 A 8/20μs); interchangeable with pin 2. |
| 2 | 2 | passive | Bidirectional, symmetrical varistor terminal (RL0603A300K: varistor voltage 26.4~33 V at 1 mA, max 22 Vdc / 16 Vac, max clamping 63 V at 30 A 8/20μs); interchangeable with pin 1. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | RUILON Shenzhen Ruilongyuan Elec |
| Package | 0603 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `RL0603A300K`
- Footprint: `Resistor_SMD:R_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `rl0603a300k-etched.step` / `rl0603a300k-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rl0603a300k.step` / `rl0603a300k.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [RUILON Shenzhen Ruilongyuan Elec datasheet](docs/rl0603a300k-datasheet.pdf) (4 pp, sha256 `5ec6fce4c0ca2210`, 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/rl0603a300k-datasheet.pdf)