# YLED0402Y

**YONGYUTAI** · LED Indication - Discrete · 0402

YLED0402Y from YONGYUTAI, 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/yled0402y/render/states.json"}

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K | passive | Cathode of the yellow LED, marked pin 2 on the package drawing; reverse voltage must not exceed 5 V and the part is not designed for reverse operation. |
| 2 | A | passive | Anode (+) of the yellow LED, marked pin 1 with a + sign on the package drawing; DC forward current is rated 20 mA max, with a current-limiting resistor required. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YONGYUTAI |
| 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 |
|---|---|---|---|---|---|---|---|
| Light Intensity | IV | 70 | 175 |  | mcd | IF = 20mA | 2 |
| Dominant Wavelength | λd | 584 | 594 |  | nm | IF = 20mA | 2 |
| Peak Wavelength | λp | 586 | 596 |  | nm | IF = 20mA | 2 |
| Forward Voltage | VF | 1.8 | 2.4 |  | V | IF = 20mA | 2 |
| Power Dissipation | Pd |  |  | 60 | mW | Ta=25℃ | 2 |
| Peak Forward Current | IFP |  |  | 60 | mA | 1/10 duty cycle, 0.1ms pulse width | 2 |
| DC Forward Current | IF |  |  | 20 | mA |  | 2 |
| Operating Temperature Range | Topr | -40 |  | 85 | °C |  | 2 |
| Storage Temperature Range | Tstg | -40 |  | 85 | °C |  | 2 |
| Reflow soldering temperature | Tsol |  |  | 260 | °C | Reflow soldering, 10 s | 2 |
| Hand soldering temperature | Tsol |  |  | 300 | °C | Hand soldering, 3 s | 2 |

## CAD (KiCad official)

- Symbol: `YLED0402Y`
- Footprint: `LED_SMD:LED_0402_1005Metric`
- 3D model: 0402 (KiCad packages3D, STEP)
- 3D model files: `yled0402y-etched.step` / `yled0402y-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `yled0402y.step` / `yled0402y.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YONGYUTAI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590927197332975616) (8 pp, sha256 `60b047f8f80ef8a0`, 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/yled0402y-datasheet.pdf)