# RB521S30T1G-DW

**DOWO** · Schottky Diodes · SOD-523

RB521S30T1G-DW from DOWO, 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 end marked by the color band; reverse voltage VR is 30 V DC (VRM 30 V peak). |
| 2 | A | passive | Anode, the end opposite the color band; mean rectifying current Io is 0.2 A and peak forward surge IFSM is 1.0 A (8.3 ms half sine). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | DOWO |
| Package | SOD-523 |
| Category | Diodes |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak reverse voltage | VRM |  |  | 30 | V |  | 1 |
| DC reverse voltage | VR |  |  | 30 | V |  | 1 |
| Mean rectifying current | Io |  |  | 0.2 | A |  | 1 |
| Peak forward surge current | IFSM |  |  | 1 | A | 8.3 ms single half sine-wave | 1 |
| Power Dissipation | PD |  |  | 150 | mW |  | 1 |
| Storage temperature range | TSTG | -50 |  | 150 | ℃ |  | 1 |
| Typical thermal resistance | RθJA |  | 667 |  | ℃/W |  | 1 |
| Maximum forward voltage | VF |  |  | 0.35 | V | IF = 10mA | 1 |
| Maximum forward voltage | VF |  |  | 0.5 | V | IF = 200mA | 1 |
| Maximum reverse breakdown voltage | VR | 30 |  |  | V | IR=1mA | 1 |
| Maximum reverse current | IR |  |  | 30 | uA | VR=10V | 1 |

## CAD (KiCad official)

- Symbol: `RB521S30T1G-DW`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `rb521s30t1g-dw-etched.step` / `rb521s30t1g-dw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rb521s30t1g-dw.step` / `rb521s30t1g-dw.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [DOWO datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603395473688711168) (3 pp, sha256 `7e2c07a1b935860d`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/rb521s30t1g-dw-datasheet.pdf)