The UP1B-220 is a radial leaded varistor manufactured by Cooper Bussmann (now Eaton). It is designed to protect electronic equipment from transient voltage surges, such as those caused by lightning strikes, inductive load switching, and electrostatic discharge (ESD). This varistor provides a cost-effective and reliable solution for overvoltage protection in various applications.

Applications:

• Protection of power supplies
• Protection of telecom equipment
• Surge protection in consumer electronics
• Overvoltage protection in industrial equipment
• Protection against lightning surges

Features:

• Radial leaded package for easy through-hole mounting
• High surge current capability
• Fast response time
• Wide operating voltage range
• RoHS compliant

Benefits:

• Protects sensitive electronic components from damaging voltage surges, improving system reliability.
• High surge current capability provides robust protection against high-energy transients.
• Fast response time ensures quick clamping of overvoltage events.
• Wide operating voltage range allows for versatile application in various circuits.
• Cost-effective solution for overvoltage protection.

Additional Details:

The UP1B-220 has a varistor voltage (V) of 220V. The maximum surge current it can withstand varies depending on the waveform (e.g., 8/20 μs). Its clamping voltage is a critical parameter, representing the voltage level to which the varistor will limit the transient voltage. The operating temperature range typically spans from -40°C to +85°C.

Varistors are voltage-dependent resistors that exhibit a highly non-linear current-voltage characteristic. At voltages below the varistor voltage, the varistor exhibits a high resistance, effectively acting as an open circuit. When the voltage exceeds the varistor voltage, the varistor resistance drops dramatically, clamping the voltage to a safe level and diverting the surge current away from sensitive components. The UP1B-220 is designed to provide reliable overvoltage protection in a wide range of electronic applications.