The **XSL-375-TF-R2** is a high-performance ultraviolet (UV) Light Emitting Diode (LED) specialized for industrial, scientific, and medical applications. It is part of the deep UV spectrum, specifically targeting the **UVB** range. --- ### 1. Key Technical Specifications Below are the primary electronic and optical characteristics typically associated with this component: | Parameter | Typical Value | Unit | | :--- | :--- | :--- | | **Peak Wavelength** | 375 | nm | | **Forward Current ($I_F$)** | 20 - 30 | mA | | **Forward Voltage ($V_F$)** | 3.2 - 4.0 | V | | **Optical Output Power** | 1.0 - 2.5 | mW | | **Viewing Angle** | 15 - 30 | Degrees | | **Operating Temperature** | -30 to +85 | °C | --- ### 2. Core Electronic Components & Construction The device is engineered using specific semiconductor materials to achieve its short-wavelength output: * **Semiconductor Material:** Typically utilizes **AlGaN (Aluminum Gallium Nitride)** technology. Unlike standard Blue or Green LEDs, UV LEDs require high aluminum content to create a wide bandgap for 375nm photon emission. * **Package Type:** Often housed in a **TO-46** metal can package or a specialized ceramic SMD with a glass/quartz lens. The quartz lens is critical because standard plastic/epoxy lenses degrade or absorb UV light over time. * **Thermal Management:** The "TF" in the series often refers to specific thermal framing or headers designed to dissipate heat away from the junction, as UV LEDs are less efficient than visible LEDs and generate significant heat. --- ### 3. Circuit Integration Requirements When designing a PCB for the XSL-375-TF-R2, the following electronic considerations are mandatory: 1. **Current Limiting:** Like all LEDs, it must be driven by a constant current source or a precisely calculated series resistor. * *Formula:* $R = (V_{source} - V_F) / I_F$ 2. **ESD Sensitivity:** UV LEDs are extremely sensitive to Electrostatic Discharge (ESD). Anti-static measures (Class 1 or higher) are required during assembly. 3. **Polarity:** The cathode is typically marked by a shorter lead or a notch on the metal header. --- ### 4. Applications * **Fluorescence Excitation:** Used in labs to make specific dyes or proteins glow. * **Curing:** Small-scale UV resin or adhesive curing. * **Counterfeit Detection:** Checking security threads in currency or identification cards. * **Medical Sensing:** Used in skin treatment devices or blood analysis equipment. --- ### ⚠️ Safety Warning The **375nm wavelength** is in the UV-A/UV-B border. While it is not as dangerous as UVC (germicidal), prolonged exposure can cause severe eye damage and skin irritation. Always use UV-rated safety goggles when the component is energized.