The **20VLS10-R** is a specific electronic component, typically categorized as a **High-Voltage Radial Lead Varistor** (Metal Oxide Varistor or MOV). These components are primarily used for surge protection and voltage clamping in power supplies and industrial equipment. --- ### 1. Technical Specifications Below are the typical technical parameters for the 20VLS10-R series: | Parameter | Specification | | :--- | :--- | | **Component Type** | Metal Oxide Varistor (MOV) | | **Disc Diameter** | 20mm | | **Varistor Voltage** | ~10V to 18V (Low voltage series) | | **Max Allowable Voltage (AC)** | ~6V - 10V | | **Max Allowable Voltage (DC)** | ~8V - 12V | | **Clamping Voltage** | ~25V - 35V | | **Surge Current (8/20μs)** | 2000A - 6500A (depending on manufacturer) | | **Mounting Type** | Through-hole (Radial Lead) | --- ### 2. Key Features * **High Energy Absorption:** Designed to handle high-energy transients and lightning surges. * **Fast Response Time:** Reacts to voltage spikes in less than 25 nanoseconds. * **Symmetry:** Offers bidirectional clamping, meaning it works for both positive and negative surges in AC or DC circuits. * **Standard Size:** The "20" in the part number refers to the 20mm disc diameter, which balances physical footprint with high power handling. --- ### 3. Applications The 20VLS10-R is commonly found in the following environments: 1. **Power Supplies:** Protecting the input stage of Switched-Mode Power Supplies (SMPS). 2. **Consumer Electronics:** Protecting sensitive internal boards in TVs, refrigerators, and washing machines. 3. **Industrial Equipment:** Guarding PLC inputs and motor controllers against grid instability. 4. **Telecommunications:** Shielding communication lines from induced surges. --- ### 4. Circuit Symbol and Connection In a schematic, a varistor is represented by a "Z" shaped line through a resistor symbol. It is almost always connected **in parallel** with the load it is protecting. ```text L (Line) -----------+----------- (Load) | [ MOV ] <-- 20VLS10-R | N (Neutral) --------+----------- (Load) ``` ---