# SMLEN3WBC8W1

**ROHM Semicon** · LED Indication - Discrete · 0603

SMLEN3WBC8W1 from ROHM Semicon, 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/smlen3wbc8w1/render/states.json"}

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K | passive | Cathode electrode, marked by the cathode index on the left of the top view; forward current IF max 10mA (peak 50mA at duty 1/10, 1kHz) flows into the anode and out of this pin, and reverse voltage must not exceed 5V. |
| 2 | A | passive | Anode electrode on the opposite end from the cathode index; forward voltage VF is 2.5 to 3.3V (typ 2.9V) at IF=5mA, and constant-current drive is recommended. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ROHM Semicon |
| 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 | VF | 2.5 | 2.9 | 3.3 | V | IF=5mA | 1 |
| Luminous Intensity | IV | 56 | 120 | 220 | mcd | IF=5mA | 1 |
| Reverse Current | IR |  |  | 10 | μA | VR=5V | 1 |
| Forward Current | IF |  |  | 10 | mA | Ta=25℃ | 1 |
| Peak Forward Current | IFP |  |  | 50 | mA | Ta=25℃, Duty 1/10, 1kHz | 1 |
| Power Dissipation | PD |  |  | 33 | mW | Ta=25℃ | 1 |
| Reverse Voltage | VR |  |  | 5 | V | Ta=25℃ | 1 |
| Storage Temperature | Tstg | -40 |  | 100 | ℃ |  | 1 |
| Operation Temperature | Topr | -40 |  | 85 | ℃ |  | 1 |
| Junction Temperature | TjMax |  |  | 100 | ℃ |  | 15 |
| Thermal Resistance (Junction/Solder Point) | Rθj-s |  | 630 |  | ℃/W | Evaluation board: glass epoxy FR4 30x10mm, t=1.6mm; pad Cu 1.4x0.5mm (Cathode), t=0.07mm | 15 |
| Thermal Resistance (Junction/Ambient) | Rθj-a |  | 740 |  | ℃/W | Evaluation board: glass epoxy FR4 30x10mm, t=1.6mm; pad Cu 1.4x0.5mm (Cathode), t=0.07mm | 15 |

## CAD (KiCad official)

- Symbol: `SMLEN3WBC8W1`
- Footprint: `LED_SMD:LED_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `smlen3wbc8w1-etched.step` / `smlen3wbc8w1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smlen3wbc8w1.step` / `smlen3wbc8w1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ROHM Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589838557687803904) (20 pp, sha256 `da12370a1cf05ce5`, 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/smlen3wbc8w1-datasheet.pdf)