The **L53U-1102-R** is a specific electronic component, typically categorized as a **T-1 3/4 (5mm) Circular LED**. It is widely used as a status indicator in various consumer electronics and industrial equipment. Below is a detailed breakdown of its technical specifications and characteristics. --- ### 1. General Specifications | Feature | Description | | :--- | :--- | | **Part Number** | L53U-1102-R | | **Component Type** | Light Emitting Diode (LED) | | **Package Size** | T-1 3/4 (Standard 5mm Diameter) | | **Lens Type** | Water Clear (High Transparency) | | **Emitted Color** | Ultra Red / High Efficiency Red | --- ### 2. Electrical Characteristics These values are critical for circuit design to ensure the longevity of the component. * **Forward Voltage ($V_f$):** Typically ranges between **1.8V to 2.2V**. * **Forward Current ($I_f$):** Standard operating current is **20mA**. * **Peak Forward Current:** Up to **150mA** (at 1/10 duty cycle, 0.1ms pulse width). * **Reverse Voltage:** Maximum **5V**. * **Power Dissipation:** Approximately **75mW**. --- ### 3. Optical Properties | Parameter | Value | | :--- | :--- | | **Luminous Intensity** | ~300 mcd to 800 mcd (varies by bin) | | **Peak Wavelength** | 630 nm - 660 nm (Red Spectrum) | | **Viewing Angle** | 20° to 30° (Narrow beam for focused light) | --- ### 4. Physical Construction The "R" suffix often denotes **RoHS Compliance**, meaning the part is manufactured without hazardous substances like lead. 1. **Cathode Identification:** The shorter lead and the flat side on the circular base of the LED housing indicate the negative (Cathode) terminal. 2. **Epoxy Resin:** The body is made of clear, hard epoxy to protect the semiconductor die and facilitate light transmission. 3. **Mounting Type:** Through-hole (THT) mounting for PCB assembly. --- ### 5. Implementation Example To connect this LED to a 5V power source, a current-limiting resistor is required. **Calculation:** $R = (V_{source} - V_f) / I_f$ $R = (5V - 2.0V) / 0.02A = 150 \Omega$ ```python # Simple Python snippet to calculate current limiting resistor def calculate_resistor(v_source, v_forward, i_forward): return (v_source - v_forward) / i_forward resistor_value = calculate_resistor(5.0, 2.0, 0.02) print(f"Required Resistor: {resistor_value} Ohms") ```