# SZYY0402R

**Yongyu Photoelectric** · LED Indication - Discrete · 0402

SZYY0402R from Yongyu Photoelectric, in a 0402. 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.


::adom-states{src="/adom/szyy0402r/render/states.json"}

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K | passive | Cathode terminal of the red LED, identified by the cathode mark on the package; reverse voltage must not exceed 5 V. |
| 2 | A | passive | Anode terminal of the red LED, the end opposite the cathode mark; forward current max 25 mA (60 mA peak), Vf 1.8 to 2.4 V at IF=10 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yongyu Photoelectric |
| Package | 0402 |
| Category | Optoelectronics |
| 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 |
|---|---|---|---|---|---|---|---|
| Forward current | IF |  |  | 25 | mA |  | 3 |
| Forward peak current | IFP |  |  | 60 | mA | pulse width ≤0.1msec, period ≤1/10 | 3 |
| Reverse voltage | VR |  |  | 5 | V |  | 3 |
| Soldering temperature (reflow) | Tsol |  |  | 250 | °C | reflow, 8 sec | 3 |
| Soldering temperature (hand soldering) | Tsol |  |  | 300 | °C | hand soldering, 3 sec | 3 |
| Operating temperature | Topr | -40 |  | 85 | °C |  | 3 |
| Storage temperature | Tstg | -40 |  | 85 | °C |  | 3 |
| Forward voltage | Vf | 1.8 | 2.4 |  | V | IF=10mA | 3 |
| Luminous intensity | Iv | 100 |  | 120 | mcd | IF=10mA | 3 |
| Dominant wavelength | λd | 618 | 621 |  | nm | IF=10mA | 3 |
| Reverse current | IR |  |  | 2 | µA | VR=5V | 3 |
| Viewing angle (2θ1/2) | 2Ө1/2 |  | 120 |  | deg | IF=10mA | 3 |
| Brightness deviation | Iv | -10 |  | 10 | % |  | 3 |
| Voltage deviation | Vf | -0.1 |  | 0.1 | V |  | 3 |
| Wavelength deviation | λd | -1 |  | 1 | nm |  | 3 |

## CAD (KiCad official)

- Symbol: `SZYY0402R`
- Footprint: `LED_SMD:LED_0402_1005Metric`
- 3D model: 0402 (KiCad packages3D, STEP)
- 3D model files: `szyy0402r-etched.step` / `szyy0402r-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `szyy0402r.step` / `szyy0402r.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yongyu Photoelectric datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589785208624357376) (8 pp, sha256 `ac141e881e38e01a`, retrieved 2026-10-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/szyy0402r-datasheet.pdf)