The **LO5411-R** is a specific type of **Through-Hole LED** (Light Emitting Diode) manufactured by OSRAM Opto Semiconductors (now ams OSRAM). It is part of the "Radial LED" family, known for its high brightness and reliability in industrial and consumer applications. --- ### 1. Key Specifications The technical parameters of the LO5411-R define its performance in electronic circuits: | Feature | Specification | | :--- | :--- | | **Color** | Orange (606 nm typical) | | **Luminous Intensity** | 112 - 280 mcd (millicandela) | | **Package Type** | T1 (5 mm diameter) | | **Viewing Angle** | 40° | | **Forward Voltage ($V_f$)** | ~2.0 V | | **Forward Current ($I_f$)** | 20 mA (standard operating) | | **Lens Appearance** | Orange Diffused | --- ### 2. Physical Characteristics The LO5411-R follows the standard radial package design: * **Encapsulation:** Epoxy resin with a diffused orange tint to ensure even light distribution. * **Leads:** Two copper alloy leads (Anode and Cathode). The longer lead is typically the Anode (+). * **Dimensions:** Standard 5 mm (T1 ¾) cylindrical body with a flange at the base. --- ### 3. Electronic Design Considerations When integrating the LO5411-R into a circuit, several factors must be considered: #### Current Limiting Resistor To prevent the LED from burning out, a resistor must be placed in series. You can calculate the value using Ohm's Law: `R = (V_source - V_f) / I_f` **Example:** For a 5V supply: `R = (5V - 2.0V) / 0.02A = 150 Ohms` #### Polarity The device is a semiconductor diode. It will only conduct light when **Forward Biased**. * **Anode (+):** Longer lead. * **Cathode (-):** Shorter lead, usually marked by a flat edge on the plastic LED housing. --- ### 4. Common Applications * **Status Indicators:** Power-on lights for machinery or consumer electronics. * **Backlighting:** Illumination for buttons, switches, or LCD panels. * **Signage:** Used in arrays for message displays or exit signs. * **Automotive:** Interior lighting or dashboard indicators. --- ### 5. Part Number Breakdown (Typical OSRAM Logic) * **LO:** Color Code (L = LED, O = Orange). * **5411:** Series/Package type (Radial 5mm). * **R:** Binning/Brightness classification.