The S20K680E2 is a varistor manufactured by EPCOS (TDK) designed to protect electronic devices and circuits from transient overvoltage conditions. These overvoltages can originate from various sources, including lightning strikes, power line surges, and electrostatic discharge (ESD). Varistors are voltage-dependent resistors that exhibit a high resistance at normal operating voltages. However, when a high-voltage transient occurs, their resistance rapidly decreases, effectively clamping the voltage and diverting the surge current away from sensitive electronic components, thereby preventing damage.

Applications

• Power supplies: Protecting AC/DC power supplies in various electronic devices from voltage surges.
• Industrial equipment: Safeguarding sensitive control circuits and machinery from voltage transients in industrial environments.
• Consumer electronics: Providing surge protection for appliances like televisions, computers, and audio equipment.
• Telecommunications equipment: Protecting communication systems from lightning strikes and other surge events.
• LED lighting: Protecting LED drivers from voltage surges, extending the lifespan of LED fixtures.

Features

• High surge current capability: Designed to withstand large surge currents without degradation or failure.
• Fast response time: Quickly clamps transient voltages to protect downstream components.
• Wide operating voltage range: Suitable for use in a variety of applications with different voltage requirements.
• Compact size: Allows for easy integration into existing circuit designs.
• RoHS compliant: Manufactured in accordance with RoHS standards, minimizing environmental impact.

Benefits

• Enhanced equipment reliability: Reduces the risk of damage to sensitive electronic components caused by voltage surges.
• Minimized downtime: Prevents equipment failures and reduces the need for costly repairs.
• Extended product lifespan: Protects against cumulative damage from repeated surge events.
• Improved safety: Reduces the risk of electrical hazards associated with overvoltage conditions.
• Cost-effective protection: Provides a simple and affordable solution for surge protection.

Technical Specifications

The S20K680E2 varistor has a varistor voltage of 680V. The maximum surge current (8/20 µs pulse) is typically around 6.0kA. The clamping voltage at this surge current level is specified in the product datasheet. It is important to consult the official EPCOS (TDK) datasheet for comprehensive electrical characteristics, mechanical dimensions, and safety certifications. The datasheet includes the operating temperature range and other important specifications. The standard case size is a 20mm disc.