component
RL1812A431K
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RUILON Shenzhen Ruilongyuan Elec Varistors, 1812. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
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RL1812A431K
RUILON Shenzhen Ruilongyuan Elec · Varistors · 1812
RL1812A431K 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, lower limit | V1mA | 387 | V | V1mA | 2 | ||
| Varistor voltage V1mA, upper limit | V1mA | 473 | V | V1mA | 2 | ||
| Varistor voltage tolerance (code K) | -10 | 10 | % | Standard tolerance K, part-number code 431K | 1 | ||
| Max allowable AC voltage | VAC | 275 | V | VAC | 2 | ||
| Max allowable DC voltage | VDC | 350 | V | VDC | 2 | ||
| Max energy | 2.3 | J | 10/1000μs | 2 | |||
| Max clamping voltage | VC | 710 | V | IP = 10 A, 8/20μs | 2 | ||
| Withstanding surge current | I | 400 | A | 8/20μs | 2 | ||
| Operating temperature range | -55 | 125 | ℃ | Operating temperature range | 1 | ||
| Storage temperature range | 5 | 40 | ℃ | Storage condition, relative humidity up to 65% | 3 | ||
| Varistor voltage change after bias humidity | -10 | 10 | % | 90%RH, 40ºC, working voltage, 1000 hrs | 3 | ||
| Varistor voltage change after thermal shock | -10 | 10 | % | -40ºC to 85ºC, 30 min cycle, 5 cycles | 3 | ||
| Varistor voltage change after full load | -10 | 10 | % | Working voltage, 85ºC, 1000 hrs | 3 |
CAD (KiCad official)
- Symbol:
RL1812A431K - Footprint:
Resistor_SMD:R_1812_4532Metric - 3D model: 1812 (KiCad packages3D, STEP)
- 3D model files:
rl1812a431k-etched.step/rl1812a431k-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rl1812a431k.step/rl1812a431k.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 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarytwo-terminal convention(convention), consensusoff(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).
# RL1812A431K
**RUILON Shenzhen Ruilongyuan Elec** · Varistors · 1812
RL1812A431K 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, lower limit | V1mA | 387 | | | V | V1mA | 2 |
| Varistor voltage V1mA, upper limit | V1mA | | | 473 | V | V1mA | 2 |
| Varistor voltage tolerance (code K) | | -10 | | 10 | % | Standard tolerance K, part-number code 431K | 1 |
| Max allowable AC voltage | VAC | | | 275 | V | VAC | 2 |
| Max allowable DC voltage | VDC | | | 350 | V | VDC | 2 |
| Max energy | | | | 2.3 | J | 10/1000μs | 2 |
| Max clamping voltage | VC | | | 710 | V | IP = 10 A, 8/20μs | 2 |
| Withstanding surge current | I | | | 400 | A | 8/20μs | 2 |
| Operating temperature range | | -55 | | 125 | ℃ | Operating temperature range | 1 |
| Storage temperature range | | 5 | | 40 | ℃ | Storage condition, relative humidity up to 65% | 3 |
| Varistor voltage change after bias humidity | | -10 | | 10 | % | 90%RH, 40ºC, working voltage, 1000 hrs | 3 |
| Varistor voltage change after thermal shock | | -10 | | 10 | % | -40ºC to 85ºC, 30 min cycle, 5 cycles | 3 |
| Varistor voltage change after full load | | -10 | | 10 | % | Working voltage, 85ºC, 1000 hrs | 3 |
## CAD (KiCad official)
- Symbol: `RL1812A431K`
- Footprint: `Resistor_SMD:R_1812_4532Metric`
- 3D model: 1812 (KiCad packages3D, STEP)
- 3D model files: `rl1812a431k-etched.step` / `rl1812a431k-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rl1812a431k.step` / `rl1812a431k.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/8771471791799840768) (5 pp, sha256 `61703208a13c9353`, retrieved 2026-10-18, 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/rl1812a431k-datasheet.pdf)