The **440LS10-R** is a specific electronic component, typically categorized as a **Safety-Certified Ceramic Disc Capacitor** manufactured by companies like Vishay Cera-Mite. These components are designed for EMI/RFI suppression in AC line applications. --- ### 1. General Specifications The 440LS10-R belongs to a family of capacitors used across power lines to filter noise and protect circuits from surges. | Parameter | Value / Description | | :--- | :--- | | **Capacitance** | 0.01 µF (10,000 pF) | | **Tolerance** | ±20% | | **Voltage Rating** | 440 VAC (X1), 440 VAC (Y1) | | **Dielectric Material** | Ceramic (Class 2) | | **Mounting Type** | Through-Hole (Radial) | | **Operating Temperature** | -30°C to +125°C | --- ### 2. Safety Classifications (X1/Y1) This part is unique because it carries dual safety ratings, which determine where it can be placed in a power circuit: * **X1 Rating:** Used for "Across-the-line" applications. It is designed to handle high impulse voltages (up to 4kV) to prevent fire if the capacitor fails. * **Y1 Rating:** Used for "Line-to-ground" (bridging the insulation) applications. These are the highest safety grade for line-to-ground, as a failure here could lead to an electric shock to the user. --- ### 3. Physical Construction The part is built to withstand harsh electrical environments: * **Encapsulation:** Coated with flame-retardant epoxy resin (UL 94 V-0). * **Terminals:** Tinned copper leads. * **Marking:** Usually includes the capacitance value, voltage, safety agency logos (UL, CSA, VDE), and the series code. --- ### 4. Common Applications Due to its safety ratings, the 440LS10-R is commonly found in: 1. **Switch Mode Power Supplies (SMPS):** Filtering electromagnetic interference. 2. **Home Appliances:** Washing machines, refrigerators, and ovens to prevent electrical noise from entering the grid. 3. **Industrial Equipment:** Motors and power controllers. 4. **Power Adapters:** Safety isolation between the AC input and DC output. --- ### 5. Part Number Breakdown While manufacturer codes vary slightly, the nomenclature usually follows this logic: * **440L:** Refers to the series/voltage rating (440 VAC). * **S10:** Represents the capacitance (10 representing the value in pF with a multiplier). * **-R:** Often denotes RoHS compliance (Lead-free).