The **LEG3392-R1-PF** is a specific part number typically associated with a **Light Emitting Diode (LED)** component, often found in status indicators, control panels, or consumer electronics. Based on standard industry naming conventions (likely from manufacturers like Kingbright or LITE-ON equivalents), here is the technical breakdown of its electronic characteristics. --- ### 1. Technical Specifications The "PF" suffix generally denotes **Lead-Free (Pb-Free)** or RoHS compliance. | Feature | Specification | | :--- | :--- | | **Component Type** | Through-Hole LED | | **Lens Shape** | Rectangular (Standard) | | **Lens Appearance** | Green Diffused (Typical for "G" series) | | **Emitted Color** | Green | | **Peak Wavelength** | ~565 nm | | **Forward Voltage ($V_f$)** | 2.1V - 2.5V | | **Forward Current ($I_f$)** | 20mA (Standard Operating) | | **Luminous Intensity** | 2 - 10 mcd (Depending on binning) | --- ### 2. Key Physical Features * **Package Dimensions:** This model usually features a $2mm \times 5mm$ rectangular face. Rectangular LEDs are preferred in stacked arrays to create bar graphs or seamless light lines. * **Lead Configuration:** Two leads (Anode and Cathode). The longer lead is typically the Anode (+). * **Housing:** The "Diffused" lens means the plastic is tinted and milky, which spreads the light evenly across the surface rather than projecting a sharp beam. --- ### 3. Circuit Integration When designing a circuit for the **LEG3392-R1-PF**, a current-limiting resistor is mandatory to prevent the LED from burning out. #### Calculation Example: To run this LED on a 5V DC supply: 1. **Formula:** $R = (V_{source} - V_f) / I_f$ 2. **Calculation:** $(5V - 2.2V) / 0.02A = 140 \Omega$ 3. **Recommended Resistor:** Use a **150 $\Omega$** or **220 $\Omega$** resistor for safety. --- ### 4. Common Applications * **Industrial Controls:** Used as "Power On" or "Status" indicators on PCBs. * **Audio Equipment:** Frequently used in level meters (VU meters) due to the stackable rectangular shape. * **IT Hardware:** Diagnostic lights on routers, switches, or server blades.