The **L45RN-R2-2111** is a high-performance LED indicator belonging to the **L45 Series** manufactured by **Sloan AG**. These components are specifically designed for industrial environments requiring high durability and visibility. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electronic and physical characteristics: | Specification | Details | | :--- | :--- | | **LED Color** | Red (indicated by the 'R' in the code) | | **Input Voltage** | 2V DC (Standard Forward Voltage) | | **Mounting Hole** | 8mm Diameter | | **Lens Style** | Raised / Prominent (N-Type) | | **Termination** | Solder Tabs / Fastons | | **Current Rating** | Typically 20mA (nominal) | --- ### 2. Key Electronic Components The assembly consists of three primary electronic layers: 1. **The Light Source:** A high-brightness AlGaInP (Aluminium Gallium Indium Phosphide) LED chip. This chemistry provides stable red light output even in fluctuating temperatures. 2. **Internal Circuitry:** * **Polarity:** These indicators are polarity sensitive (Anode/Cathode). * **Protection:** While the R2 variant is a low-voltage DC model, the internal housing often includes basic ESD protection. 3. **Housing & Insulation:** The body is usually made of nickel-plated brass or high-grade plastic, providing a common ground or isolated path depending on the specific mounting washer used. --- ### 3. Application Use Cases Because of its "Raised" (R) lens design, it provides a wide viewing angle (up to 180°), making it ideal for: * **Control Panels:** Status indication for heavy machinery. * **Signal Units:** Alerting operators to "Stop" or "Error" states. * **Outdoor Equipment:** The assembly is typically rated for IP67, meaning it is dust-tight and protected against water immersion. --- ### 4. Installation Diagram (Simplified) To integrate this into a circuit, a current-limiting resistor is required if your supply voltage exceeds 2V. ```cpp [DC Source +] ---- [Resistor] ---- [Anode (+)] | (LED) | [DC Source -] -------------------- [Cathode (-)] ``` ---