The **440LD80-R** is a specific type of high-voltage ceramic disc capacitor manufactured by **Vishay Cera-Mite**. These components are widely used in industrial and power applications due to their high reliability and voltage ratings. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics. | Parameter | Specification | | :--- | :--- | | **Capacitance Value** | 8,000 pF (8 nF) | | **Voltage Rating** | 440 VAC (RMS) / 1000 VDC | | **Tolerance** | ±20% | | **Dielectric Material** | Ceramic (Class 2) | | **Lead Style** | Radial | | **Mounting Type** | Through-Hole | ### 2. Key Features * **Safety Agency Recognition:** These are often categorized as "Across-the-line" or "Line-to-ground" capacitors, designed to handle high-voltage transients. * **Low Dissipation Factor:** Ensures minimal energy loss and low heat generation during operation. * **Encapsulation:** Coated with flame-retardant epoxy resin (UL 94 V-0 compliant) for environmental protection and insulation. * **AC Voltage Rating:** Specifically optimized for AC power lines, meaning it can withstand continuous 440V AC stress. --- ### 3. Common Applications The 440LD80-R is typically found in circuits where electrical noise suppression or safety isolation is required: 1. **EMI/RFI Filtering:** Suppressing electromagnetic interference in power supplies. 2. **Antenna Coupling:** Providing isolation while allowing signal passage. 3. **Line Bypass:** Used in line-to-line or line-to-ground configurations to filter transients. 4. **Industrial Controls:** Integrated into heavy machinery power modules to protect sensitive electronics from voltage spikes. ### 4. Part Number Breakdown (Example) While specific to the Vishay series, the codes usually represent: * **440L:** Refers to the series type (440V AC rating). * **D80:** Represents the capacitance code (80 x $10^2$ pF or similar depending on the specific manufacturer coding logic). * **-R:** Often denotes RoHS compliance (Restriction of Hazardous Substances). ---