# SMD4532-400NF

**RUILON Shenzhen Ruilongyuan Elec** · Gas Discharge Tube Arresters (GDT) · 1812

SMD4532-400NF 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 the two-electrode GDT (non-polarized, interchangeable with terminal 2), with 400V ±30% DC spark-over voltage at 100V/s and 2kA 8/20μs impulse discharge current rating. |
| 2 | 2 | passive | Terminal 2 of the two-electrode GDT (non-polarized, interchangeable with terminal 1), with less than 0.5pF capacitance at 1MHz and 1GΩ minimum insulation resistance. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | RUILON Shenzhen Ruilongyuan Elec |
| Package | 1812 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `SMD4532-400NF`
- Footprint: `Resistor_SMD:R_1812_4532Metric`
- 3D model: 1812 (KiCad packages3D, STEP)
- 3D model files: `smd4532-400nf-etched.step` / `smd4532-400nf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smd4532-400nf.step` / `smd4532-400nf.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/8588884633568358400) (6 pp, sha256 `784a04611eee6d5f`, retrieved 2026-09-29, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/smd4532-400nf-datasheet.pdf)