component
RL1812A391K
Public Made by Adomby adom
RUILON Shenzhen Ruilongyuan Elec Varistors, 1812. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownRL1812A391K
RUILON Shenzhen Ruilongyuan Elec · Varistors · 1812
RL1812A391K 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 | One terminal of the bidirectional, symmetrical varistor (WB 0.60±0.25 mm end termination); for RL1812A391K the varistor voltage is 351~429 V at 1 mA, with max allowable voltage 250 VAC / 320 VDC. |
| 2 | 2 | passive | Second terminal of the bidirectional, symmetrical varistor, interchangeable with the other terminal; for RL1812A391K the varistor voltage is 351~429 V at 1 mA, with max allowable voltage 250 VAC / 320 VDC. |
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 | V1mA | 351 | 429 | V | 2 | ||
| Max allowable voltage (AC) | VAC | 250 | V | 2 | |||
| Max allowable voltage (DC) | VDC | 320 | V | 2 | |||
| Max energy | 2.3 | J | 10/1000μs | 2 | |||
| Max clamping voltage | VC | 675 | V | 8/20μs, IP = 10 A | 2 | ||
| Withstanding surge current | I | 400 | A | 8/20μs | 2 | ||
| Tolerance (K code) | -10 | 10 | % | Standard tolerance K: ±10% | 1 | ||
| Varistor voltage change after bias humidity | VV/VV | -10 | 10 | % | 90%RH, 40ºC, working voltage, 1000 hrs | 3 | |
| Varistor voltage change after thermal shock | VV/VV | -10 | 10 | % | -40ºC to 85ºC, 30 min cycle, 5 cycles | 3 | |
| Varistor voltage change after full load | VV/VV | -10 | 10 | % | Working voltage, 85ºC, 1000 hrs | 3 | |
| Response time | 1 | ns | <1ns as printed | 3 | |||
| Operating temperature range | -55 | 125 | ℃ | 1 | |||
| Storage temperature range | 5 | 40 | ℃ | Storage; relative humidity up to 65% | 3 |
CAD (KiCad official)
- Symbol:
RL1812A391K - Footprint:
Resistor_SMD:R_1812_4532Metric - 3D model: 1812 (KiCad packages3D, STEP)
- 3D model files:
rl1812a391k-etched.step/rl1812a391k-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rl1812a391k.step/rl1812a391k.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: RUILON Shenzhen Ruilongyuan Elec datasheet (5 pp, sha256
61703208a13c9353, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).