# LTW-C191DS5

**Lite On** · LED Indication - Discrete · 0603

LTW-C191DS5 from Lite On, in a 0603. 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/ltw-c191ds5/render/states.json"}

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K | passive | Cathode terminal, marked with the cathode dot on the package drawing; the rated reverse voltage is 5 V and DC forward current is 20 mA max. |
| 2 | A | passive | Anode terminal (+), the opposite soldering terminal from the cathode mark; forward voltage is 2.70 to 3.15 V at IF = 5 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Lite On |
| Package | 0603 |
| 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 (bin A/B/C range at IF = 5mA) | VF | 2.7 |  | 3.15 | V | IF = 5mA | 4 |
| Luminous Intensity (bin Q/R range at IF = 5mA) | IV | 71 |  | 180 | mcd | IF = 5mA | 4 |
| Reverse Current | IR |  |  | 10 | μA | VR = 5V | 4 |
| Viewing Angle | 2θ1/2 |  | 130 |  | deg | Fig.6 | 4 |
| Forward Voltage bin tolerance | VF | -0.1 |  | 0.1 | V | Per VF bin | 6 |
| Luminous Intensity bin tolerance | IV | -15 |  | 15 | % | Per IV bin | 6 |
| Chromaticity bin tolerance | x, y | -0.01 |  | 0.01 |  | Per hue (x, y) bin | 6 |
| Power Dissipation |  |  |  | 72 | mW |  | 3 |
| Peak Forward Current |  |  |  | 100 | mA | 1/10 Duty Cycle, 0.1ms Pulse Width | 3 |
| DC Forward Current |  |  |  | 20 | mA |  | 3 |
| Reverse Voltage |  |  |  | 5 | V |  | 3 |
| Operating Temperature Range |  | -30 |  | 85 | °C |  | 3 |
| Storage Temperature Range |  | -55 |  | 105 | °C |  | 3 |
| Infrared Soldering Condition |  |  |  | 260 | °C | For 10 Seconds | 3 |
| Reflow pre-heat temperature |  | 150 |  | 200 | °C | Reflow soldering pre-heat | 9 |
| Reflow pre-heat time |  |  |  | 120 | sec. | Reflow soldering pre-heat | 9 |
| Reflow peak temperature |  |  |  | 260 | °C | Reflow soldering | 9 |
| Reflow soldering time |  |  |  | 10 | sec. | Reflow soldering; max two times | 9 |
| Soldering iron temperature |  |  |  | 300 | °C | Soldering iron; one time only | 9 |
| Soldering iron time |  |  |  | 3 | sec. | Soldering iron; one time only | 9 |

## CAD (KiCad official)

- Symbol: `LTW-C191DS5`
- Footprint: `LED_SMD:LED_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `ltw-c191ds5-etched.step` / `ltw-c191ds5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ltw-c191ds5.step` / `ltw-c191ds5.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Lite On datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590008784056573952) (12 pp, sha256 `4e7d9bc26e716452`, retrieved 2026-10-17, 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/ltw-c191ds5-datasheet.pdf)