# RLSD32A121LC

**RUILON Shenzhen Ruilongyuan Elec** · ESD And Surge Protection (TVS/ESD) · SOD-323

RLSD32A121LC from RUILON Shenzhen Ruilongyuan Elec, in a SOD-323. 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 | Bidirectional TVS/ESD terminal (interchangeable with pin 2) for RLSD32A121LC with 12.0 V reverse stand-off, 13.3 V minimum breakdown at 1 mA, 19.0 V clamp at 1 A and 30 V at 8 A (8/20 μs). |
| 2 | 2 | passive | Bidirectional TVS/ESD terminal (interchangeable with pin 1) protecting one line, with 300 W peak pulse power (8/20 μs), ±8 kV contact and ±15 kV air ESD, and 1 pF typical capacitance. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | RUILON Shenzhen Ruilongyuan Elec |
| Package | SOD-323 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Stand-Off Voltage | VRWM |  | 12 |  | V |  | 1 |
| Minimum Breakdown Voltage | VBR | 13.3 |  |  | V | @1mA | 1 |
| Clamping Voltage | VC |  |  | 19 | V | @1A | 1 |
| Peak Pulse Clamping Voltage | VC |  |  | 30 | V | @IPP, 8/20μs, IPP = 8 A | 1 |
| Reverse Leakage | IR |  |  | 1 | μA | @VRWM | 1 |
| Peak Pulse Power | PPP |  |  | 300 | Watts | tp = 8/20μs | 1 |
| ESD Voltage (Contact) | VESD | -8 |  | 8 | kV |  | 1 |
| ESD Voltage (Air) | VESD | -15 |  | 15 | kV |  | 1 |
| Operating Temperature | TOPT | -55 |  | 150 | °C |  | 1 |
| Storage Temperature | TSTG | -55 |  | 150 | °C |  | 1 |
| Typical Capacitance | CJ |  | 1 |  | pF | DC=0V, @ 1 MHz | 1 |
| Peak Pulse Current | IPP |  | 8 |  | A | 8/20μs | 1 |

## CAD (KiCad official)

- Symbol: `RLSD32A121LC`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `rlsd32a121lc-etched.step` / `rlsd32a121lc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rlsd32a121lc.step` / `rlsd32a121lc.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/8586173503779717120) (3 pp, sha256 `609b086880e2de33`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-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).

[Datasheet PDF](docs/rlsd32a121lc-datasheet.pdf)