RL0402E012M300K

@@ -0,0 +1,43 @@+# RL0402E012M300K++**RUILON Shenzhen Ruilongyuan Elec** · Varistors · 0402++RL0402E012M300K from RUILON Shenzhen Ruilongyuan Elec, in a 0402. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | A | passive | Terminal electrode 1 of the metal oxide varistor. Bidirectional/symmetric: the two terminals are electrically interchangeable. Connect between the protected line and the reference (typically ground) to clamp ESD/transients above the ~200 V trigger voltage down to ~50 V. |+| 2 | B | passive | Terminal electrode 2 of the metal oxide varistor. Bidirectional/symmetric: identical function to terminal 1. Typically routed to the signal line (or ground) opposite terminal 1 for shunt ESD protection. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | RUILON Shenzhen Ruilongyuan Elec |+| Package | 0402 |+| Category | Circuit Protection |+| Pins | 2 |++## Ordering variants++Same part, different packaging or reel option.++- `RL0402E012M300K`++## CAD (KiCad official)++- Symbol: `RL0402E012M300K`+- Footprint: `Resistor_SMD:R_0402_1005Metric`+- 3D model: 0402 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [RUILON Shenzhen Ruilongyuan Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586172511818297344) (7 pp, sha256 `4986f3f7e248068a`, retrieved 2026-08-17, 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/rl0402e012m300k-datasheet.pdf)

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