The **LURLVIR9553-R4** refers to a high-intensity **Infrared (IR) Emitting Diode** packaged in a standard T-1 (3mm) or T-1 3/4 (5mm) lead frame, typically manufactured by Everlight or similar electronic component suppliers. --- ## 1. Technical Specifications Below is a breakdown of the primary electronic characteristics for this component: | Parameter | Typical Value | Unit | | :--- | :--- | :--- | | **Peak Wavelength** | 940 | nm (Nanometers) | | **Forward Voltage ($V_F$)** | 1.2 - 1.5 | Volts (V) | | **Forward Current ($I_F$)** | 20 - 100 | Milliamps (mA) | | **Radiant Intensity ($I_E$)** | 5 - 20 | mW/sr | | **Viewing Angle** | 20 - 40 | Degrees | | **Operating Temperature** | -40 to +85 | °C | --- ## 2. Key Electronic Components & Materials * **Semiconductor Material:** It is typically constructed using **GaAlAs** (Gallium Aluminum Arsenide) on a GaAs substrate. This material is chosen for its efficiency in converting electrical energy into infrared light. * **Encapsulation:** The "R4" usually denotes a specific resin or lens type. It features a water-clear or blue-tinted epoxy resin that acts as a focusing lens for the IR beam. * **Lead Frame:** Standard through-hole pins (Anode and Cathode). The Cathode is usually identified by the shorter lead and a flat edge on the LED body. --- ## 3. Operating Principles 1. **Infrared Emission:** Unlike standard LEDs, this part emits light in the 940nm spectrum, which is invisible to the human eye but detectable by silicon photodiodes and CMOS cameras. 2. **Current Regulation:** Because it is a diode, it requires a current-limiting resistor. Use Ohm's Law ($R = (V_{source} - V_F) / I_F$) to calculate the necessary resistance. 3. **Modulation:** In most electronic circuits (like remote controls), this part is "pulsed" (modulated) at frequencies like 38kHz to distinguish the signal from ambient IR noise (sunlight). --- ## 4. Common Applications * **Remote Controls:** TV, Air Conditioning, and Audio equipment. * **Optical Switches:** Used in "Interruptor" circuits to detect the presence of an object. * **Infrared Illumination:** Small-scale night vision for security cameras. * **Data Transmission:** Low-speed wireless data links between microcontrollers. ---