The **B72210S0140K101** is a high-performance Metal Oxide Varistor (MOV) from the StandarD series, manufactured by **TDK Electronics (formerly EPCOS)**. It is primarily used for overvoltage protection in electronic circuits. --- ## 1. Technical Specifications The following table summarizes the key electrical and physical characteristics of the component: | Parameter | Specification | Detail | | :--- | :--- | :--- | | **Varistor Voltage** | 22 V | Measured at 1mA DC | | **Max. Operating Voltage (AC)** | 14 V | RMS value | | **Max. Operating Voltage (DC)** | 18 V | Continuous DC voltage | | **Clamping Voltage** | 43 V | Max voltage during a surge (at 5A) | | **Surge Current (8/20 µs)** | 500 A | Peak current the device can handle | | **Energy Absorption** | 2.0 J | Maximum energy dissipation (2ms) | | **Capacitance** | ~1900 pF | Measured at 1 kHz | | **Disk Size** | 10 mm | Diameter of the ceramic disk | --- ## 2. Part Number Breakdown Understanding the nomenclature helps in identifying the series and physical size: - **B722**: Product group (Varistors). - **10**: Disk diameter (10 mm). - **S**: Model (StandarD series). - **0140**: Voltage code (14V AC RMS). - **K101**: Tolerance and packaging (K = ±10% tolerance). --- ## 3. Core Functions and Applications This component acts as a "voltage-sensitive resistor." Under normal operating voltages, it has high resistance. When a voltage spike (transient) occurs, its resistance drops sharply, diverting the excess current to ground. ### Common Use Cases: 1. **Low Voltage DC Protection:** Protecting sensors and logic circuits in automotive or industrial environments. 2. **Power Supply Input:** Clamping noise and surges in low-voltage power rails. 3. **Communication Lines:** Protecting data lines from electrostatic discharge (ESD) or inductive switching spikes. 4. **Consumer Electronics:** Used in battery-powered devices to prevent damage from incorrect chargers. --- ## 4. Key Advantages - **Fast Response Time:** Reacts to transients in less than 25 nanoseconds. - **High Surge Handling:** Despite its small 10mm size, it can handle a 500A peak current. - **Durability:** Designed for a wide operating temperature range (-40°C to +85°C).