The S20K625E2 is a varistor from EPCOS (TDK) designed to protect electronic equipment from transient overvoltages. Varistors are voltage-dependent resistors that offer a high resistance under normal operating conditions. However, when subjected to a voltage surge, their resistance rapidly decreases, effectively clamping the voltage and diverting the surge current away from sensitive components, thereby safeguarding them from damage.

Applications

• Power supplies: Protecting power supplies from voltage spikes and surges.
• Consumer electronics: Safeguarding TVs, computers, and other household appliances from power line disturbances.
• Industrial equipment: Protecting sensitive control circuits in industrial machinery.
• Telecommunications equipment: Ensuring reliable operation of communication systems by mitigating the effects of lightning and other surges.
• LED lighting: Protecting LED drivers from voltage surges, increasing the lifespan of LED fixtures.

Features

• High surge current capability: Able to withstand large surge currents without failure.
• Fast response time: Quickly clamps overvoltages, providing immediate protection.
• Wide operating voltage range: Suitable for a variety of applications with different voltage requirements.
• Compact size: Allows for easy integration into electronic circuits.
• RoHS compliant: Meets environmental regulations regarding hazardous substances.

Benefits

• Enhanced equipment reliability: Protects electronic devices from damage caused by overvoltages.
• Reduced downtime: Minimizes equipment failures due to voltage surges, leading to less downtime and reduced maintenance costs.
• Extended product lifespan: Protects sensitive components from degradation caused by repeated exposure to overvoltages.
• Improved safety: Reduces the risk of electrical hazards associated with voltage surges.
• Cost-effective protection: Provides a simple and inexpensive solution for overvoltage protection.

Technical Specifications

The S20K625E2 varistor has a varistor voltage of 625V. The maximum surge current (8/20 µs pulse) that can be handled is typically around 6.0kA. The clamping voltage at this surge current level is specified in the datasheet. It is crucial to refer to the official EPCOS (TDK) datasheet for comprehensive electrical characteristics, mechanical dimensions, and safety certifications. The datasheet will also include the operating temperature range. The typical case size is a 20mm disc.