The **SMA24VG-CC2-R** is a specific surface-mount technology (SMT) component, typically classified as a **Side-view Surface Mount LED** or an **Infrared Emitter**, often used in proximity sensing or optical communication applications. Below is a detailed breakdown of its electronic parts and characteristics. --- ### 1. General Specifications This component is designed for compact electronic assemblies where space is at a premium and a horizontal (side-looking) light path is required. | Parameter | Typical Value / Description | | :--- | :--- | | **Package Type** | Side-looking SMT (Surface Mount Technology) | | **Wavelength** | Usually 940nm (Infrared) or Specific Visible Color | | **Forward Voltage ($V_f$)** | ~1.2V to 1.5V (for IR) or 2.0V - 3.2V (for Visible) | | **Forward Current ($I_f$)** | 20mA (Standard Operating) | | **Lens Type** | Clear / Water Clear | | **Mounting Orientation** | Right Angle / Side View | --- ### 2. Internal Components & Construction The "electronic parts" within this small package consist of several critical layers: #### A. The Semiconductor Die (Chip) The heart of the component is the **LED Die**. For an infrared version, this is typically made of **Gallium Aluminum Arsenide (GaAlAs)**. This material determines the wavelength of the light emitted when electrons recombine with holes. #### B. Lead Frame The metal structure that provides electrical connectivity and mechanical support. * **Anode (+):** The positive terminal. * **Cathode (-):** The negative terminal (often marked with a notch or a green line on the package). #### C. Wire Bond A microscopic gold (Au) wire that connects the top of the semiconductor die to one of the lead frame terminals. Gold is used for its excellent conductivity and resistance to corrosion. #### D. Encapsulation / Lens A clear epoxy resin or silicone-based mold that protects the internal die and wire bond from humidity and physical damage. The shape of this mold acts as a **lens** to focus the light beam at a specific angle (e.g., 120° or 60°). --- ### 3. Key Features * **Small Footprint:** Designed for automated "pick and place" machines. * **Low Power Consumption:** Operates efficiently at low currents, making it ideal for battery-powered devices. * **Side-Emitting:** Unlike standard LEDs that shine upward, this emits light parallel to the PCB, allowing for "light pipe" applications or edge-lighting. --- ### 4. Common Applications Due to its side-view nature, the SMA24VG-CC2-R is frequently found in: 1. **Optical Encoders:** Sensing the rotation of wheels or gears. 2. **Backlighting:** Providing light for LCD screens or small buttons. 3. **Proximity Sensors:** Detecting the presence of an object in mobile phones or laptops. 4. **Remote Controls:** Small form-factor IR blasters.