The S20K275E2K1 is a varistor manufactured by EPCOS (TDK) used for transient voltage suppression. It's designed to protect electronic circuits and equipment from voltage surges caused by events such as lightning strikes, inductive load switching, and electrostatic discharge (ESD). This varistor provides a reliable method to limit overvoltages and protect sensitive components from damage.

Applications

• Power supplies (AC/DC and DC/DC)
• Industrial control systems
• Lighting systems
• Telecom equipment
• Surge protection devices (SPDs)

Features

• High surge current capability
• Fast response time
• UL, CSA, VDE, and IEC approvals
• Wide operating voltage range
• RoHS compliant
• Lead-free terminations

Benefits

• Reliable protection against overvoltage transients
• Extended lifespan of electronic equipment
• Reduced downtime and maintenance costs
• Compliance with industry safety standards
• Easy integration into circuits
• Cost-effective surge protection solution

Additional Details

The S20K275E2K1 has a varistor voltage of 275V, meaning that it will begin to conduct and clamp the voltage when the voltage across it exceeds this threshold. The 'S20' refers to the disk size (20mm), influencing its surge current handling capacity. The 'E2K1' suffix indicates the lead configuration and packaging. It is crucial to consult the EPCOS (TDK) datasheet for detailed specifications, including the maximum surge current rating (specified for an 8/20 µs pulse), clamping voltage characteristics, energy absorption capabilities, and operating temperature range. These parameters are critical for selecting the appropriate varistor for a specific application. This device is designed for through-hole mounting. The ambient operating temperature is a key consideration, as it affects the varistor's performance and lifespan. The varistor's non-linear resistance allows it to quickly respond to overvoltage events and protect downstream components. It's important to consider the derating curves provided in the datasheet, as the surge current capability decreases with increasing ambient temperature.