TVS diodes (ESD protection devices) are used to prevent electronic equipment from breakdown or malfunctioning due to ESD. By using TVS diodes, ESD is released through the TVS diodes before it enters the IC or electrical circuit and damages them. For example, if ESD enters the inside of the device through the USB connector, the device can be protected by the TVS diode.
Murata offers 0.4 mm x 0.2 mm (size 0402), 0.6 mm x 0.3 mm (size 0603), and 1.0 mm x 0.6 mm (size 1006) sizes to protect a wide range of applications from power lines to high-speed transmission lines.