# DY-204UYGD

**TONYU** · LED Indication - Discrete · LED_D3.0mm

DY-204UYGD from TONYU, in a LED_D3.0mm. 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/dy-204uygd/render/states.json"}

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K | passive | Cathode of the LED; reverse voltage 5 V max (VR), reverse current 10 µA max at VR=5V. |
| 2 | A | passive | Anode of the AlGaInP yellow-green LED; forward current 25 mA max (IF), 20 mA test condition with VF 1.8 to 2.4 V, needs a series protection resistor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TONYU |
| Package | LED_D3.0mm |
| 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 voltage | VF | 1.8 |  | 2.4 | V | IF=20mA | 4 |
| Reverse current | IR |  |  | 10 | μA | VR=5V | 4 |
| Luminous intensity | IV | 4.5 |  | 150 | Mcd | IF=20mA | 4 |
| Forward voltage tolerance (measurement note) | VF | -0.1 |  | 0.1 | v |  | 4 |
| Radiant intensity tolerance (measurement note) | IV | -10 |  | 10 | % |  | 4 |
| Wavelength tolerance (measurement note) | λd | -1 |  | 1 | nm |  | 4 |
| Forward current | IF |  |  | 25 | mA |  | 6 |
| Peak forward current | IFp |  |  | 75 | mA | Pulse Width≤100μs and Duty≤1% | 6 |
| Reverse voltage | VR |  |  | 5 | V |  | 6 |
| Power dissipation | Pd |  |  | 60 | mW |  | 6 |
| Operating temperature | Tamb | -25 |  | 80 | ℃ |  | 6 |
| Storage temperature | Tstg | -35 |  | 85 | ℃ |  | 6 |
| Soldering temperature | Tsol |  |  | 260 | ℃ | Wave soldering, 3mm out of physical body, ≤3S | 6 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | The kinked tooling scrape easily the pin of LED, where the LED bracket is rusting easily, especial expose it in moist air. To decrease the LED bracket rust, advise using plated tin LED bracket. | 8 |

## CAD (KiCad official)

- Symbol: `DY-204UYGD`
- Footprint: `LED_THT:LED_D3.0mm`
- 3D model: LED_D3.0mm (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [TONYU datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588887815241814016) (8 pp, sha256 `34152e31a0ac6814`, retrieved 2026-11-06, 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/dy-204uygd-datasheet.pdf)