Voltage clamping devices are electrical components designed to protect circuits from voltage spikes. They work by limiting the voltage to a safe level, preventing damage to sensitive equipment. Common types include varistors, TVS diodes, and zener diodes, each serving to absorb excess voltage and redirect it safely. These devices are essential in various applications, such as power supplies and communication lines, where voltage surges can occur due to lightning strikes or switching operations. By ensuring that voltage levels remain within specified limits, voltage clamping devices help maintain the reliability and longevity of electronic systems.