The **V20E550AUTO2T** is a high-performance **Metal Oxide Varistor (MOV)** manufactured by Littelfuse. It belongs to the **UltraMOV™ Varistor Series**, which is specifically designed for high-surge current handling and automotive or industrial protection applications. --- ### ## Technical Specifications Below are the primary electrical characteristics for this component: | Parameter | Specification | | :--- | :--- | | **Maximum Continuous AC Voltage** | 550V RMS | | **Maximum Continuous DC Voltage** | 745V DC | | **Varistor Voltage (at 1mA DC)** | 910V (819V - 1001V Range) | | **Clamping Voltage (at 100A)** | 1500V | | **Peak Surge Current (8/20µs)** | 10,000 Amps | | **Energy Rating (2ms)** | 330 Joules | | **Capacitance (at 1MHz)** | ~400 pF | | **Disk Diameter** | 20mm | --- ### ## Component Features * **High Surge Capacity:** Capable of handling up to 10,000A for a single pulse (8/20µs), making it ideal for high-energy transient protection. * **AEC-Q200 Qualified:** The "AUTO" suffix indicates that this part is automotive grade, tested for high reliability under mechanical stress and temperature fluctuations. * **Operating Temperature:** Rated for operation between **-55°C to +125°C**, suitable for harsh engine or industrial environments. * **Lead Configuration:** The "2T" suffix generally refers to specific lead crimp styles and packaging (Tape and Reel or Ammo Pack). --- ### ## Functional Application This part acts as a voltage-sensitive resistor. Under normal operating voltages, it maintains a high resistance. When a high-voltage spike (transient) occurs, its resistance drops rapidly, shunting the excess current to ground and protecting sensitive downstream electronics. #### **Common Use Cases:** 1. **Automotive Electronics:** Protection for On-Board Chargers (OBC) and DC/DC converters in Electric Vehicles. 2. **Power Supplies:** Surge protection in industrial Switch Mode Power Supplies (SMPS). 3. **Industrial Automation:** Protection for motor controllers and PLC interfaces. 4. **Renewable Energy:** Used in solar inverters to protect against lightning-induced surges. ---