# RL1812A101K

**RUILON Shenzhen Ruilongyuan Elec** · Varistors · 1812

RL1812A101K from RUILON Shenzhen Ruilongyuan Elec, in a 1812. 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 1 of an unpolarised resistor; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised resistor; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | RUILON Shenzhen Ruilongyuan Elec |
| Package | 1812 |
| 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 |
|---|---|---|---|---|---|---|---|
| Varistor voltage | V1mA | 103.5 |  | 126.5 | V |  | 2 |
| Tolerance (K, standard) |  | -10 |  | 10 | % |  | 1 |
| Max. allowable voltage (AC) | VAC |  |  | 60 | V |  | 2 |
| Max. allowable voltage (DC) | VDC |  |  | 85 | V |  | 2 |
| Max. energy |  |  |  | 1.8 | J | 10/1000μs | 2 |
| Max. clamping voltage | VC |  |  | 202 | V | 8/20μs, IP = 10 A | 2 |
| Withstanding surge current | I |  |  | 500 | A | 8/20μs | 2 |
| Varistor voltage change after bias humidity | VV / VV | -10 |  | 10 | % | 90%RH, 40ºC, working voltage, 1000 hrs | 2 |
| Varistor voltage change after thermal shock | VV / VV | -10 |  | 10 | % | -40ºC to 85ºC, 30 min cycle, 5 cycles | 2 |
| Varistor voltage change after full load | VV / VV | -10 |  | 10 | % | Working voltage, 85ºC, 1000 hrs | 2 |
| Response time |  |  |  | 1 | ns |  | 2 |
| Operating temperature range |  | -55 |  | 125 | ℃ |  | 1 |
| Storage temperature range |  | 5 |  | 40 | ºC | Storage condition, relative humidity up to 65%, storage time 12 months max | 2 |

## CAD (KiCad official)

- Symbol: `RL1812A101K`
- Footprint: `Resistor_SMD:R_1812_4532Metric`
- 3D model: 1812 (KiCad packages3D, STEP)
- 3D model files: `rl1812a101k-etched.step` / `rl1812a101k-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rl1812a101k.step` / `rl1812a101k.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/8590918743025938432) (4 pp, sha256 `4a1070b2e69bcfcd`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `two-terminal 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/rl1812a101k-datasheet.pdf)