# RLSD52A051LC

**RUILON(Shenzhen Ruilongyuan Elec)** · ESD Protection Devices · SOD-523

RLSD52A051LC from RUILON(Shenzhen Ruilongyuan Elec), in a SOD-523. 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | RUILON(Shenzhen Ruilongyuan Elec) |
| Package | SOD-523 |
| 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 |
|---|---|---|---|---|---|---|---|
| ESD Voltage (Contact) | VESD | -15 |  | 15 | kV | Contact discharge, IEC61000-4-2 | 1 |
| ESD Voltage (Air) | VESD | -15 |  | 15 | kV | Air discharge, IEC61000-4-2 | 1 |
| Lead Soldering Temperature | TL |  |  | 260 | °C | 10 sec. | 1 |
| Junction Temperature Range | TJ | -55 |  | 125 | °C |  | 1 |
| Storage Temperature | TSTG | -55 |  | 150 | °C |  | 1 |
| Reverse Stand-Off Voltage | VRWM |  |  | 5 | V |  | 1 |
| Minimum Breakdown Voltage | VBR |  |  | 5.4 | V | @1mA | 1 |
| Clamping Voltage | VC |  | 12.9 |  | V | @8/20μs, IPP = 3 A | 1 |
| Reverse Leakage Current | IR |  |  | 1 | μA | @VRWM | 1 |
| Typical Capacitance | CJ |  | 0.5 |  | pF | DC=0V, @1 MHz | 1 |

## CAD (KiCad official)

- Symbol: `RLSD52A051LC`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `rlsd52a051lc-etched.step` / `rlsd52a051lc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rlsd52a051lc.step` / `rlsd52a051lc.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [RUILON(Shenzhen Ruilongyuan Elec) datasheet](docs/rlsd52a051lc-datasheet.pdf) (3 pp, sha256 `b6dacede4bf22cf4`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band 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/rlsd52a051lc-datasheet.pdf)