## SML-R12U8T Electronic Component Overview The **SML-R12U8T** is a high-performance Surface Mount (SMD) Light Emitting Diode (LED) manufactured by **ROHM Semiconductor**. It belongs to the SML-R12 series, which is characterized by its compact size and high brightness. --- ### 1. Key Technical Specifications The following table outlines the primary electrical and optical characteristics of the SML-R12U8T: | Feature | Specification | Unit | | :--- | :--- | :--- | | **Color** | Red | - | | **Wavelength** | 624 nm | nm | | **Luminous Intensity** | 40 to 100 (Typical) | mcd | | **Forward Voltage ($V_F$)** | 1.9 (Typical) | V | | **Forward Current ($I_F$)** | 20 | mA | | **Operating Temperature** | -40 to +85 | °C | | **Package Size** | 0603 (1608 Metric) | inch (mm) | --- ### 2. Physical Dimensions & Construction The SML-R12U8T is designed for automated assembly using SMT (Surface Mount Technology) processes. * **Footprint:** 1.6mm x 0.8mm (Height: 0.8mm). * **Encapsulation:** Clear transparent resin. * **Material:** AlGaInP (Aluminium Gallium Indium Phosphide), which is the standard semiconductor material for high-efficiency red/orange/yellow LEDs. --- ### 3. Application Use Cases Due to its small form factor and reliability, this LED is commonly used in: 1. **Consumer Electronics:** Status indicators for smartphones, wearables, and laptops. 2. **Automotive:** Dashboard illumination and button backlighting. 3. **Industrial:** Control panel signal lights and diagnostic indicators. --- ### 4. Implementation Example (Circuit) To drive the SML-R12U8T safely from a 5V source, a current-limiting resistor is required. ```cpp // Basic Calculation for Resistor (R): // R = (V_source - V_forward) / I_forward // R = (5V - 1.9V) / 0.020A = 155 Ohms ``` Typical circuit connection: `[5V Supply] --> [150-180 Ohm Resistor] --> [Anode - SML-R12U8T - Cathode] --> [GND]` ---