The most common method for ESD protection is to use small silicon based transient voltage suppressor (TVS) diodes in avalanche breakdown mode as the first level of protection. A wide range of working peak operating voltages are available in unidirectional or bidirectional configuration, arranged in discrete or array packages. TVS diodes provide ESD protection per IEC 61000-4-2 while their enhanced construction can provide additional electrical fast transient (EFT) and surge protection to the IEC 61000-4-4 and IEC 61000-4-5 standards respectively. Bourns offers ChipGuard® ESD Suppressor products using ceramic technology as an alternative ESD Protection solution. The ESD Suppressor has a threshold voltage where the initial resistance is high (120 MΩ for Bourns® CG0603MLC family). As the voltage increases, the resistance reduces with a resultant exponential increase in the current through the device. This allows the overvoltage disturbance to be shunted away from the circuit it is protecting while the energy is dissipated in the protector. Once the electrical disturbance has passed, the ESD suppressor will return to its high resistance off state.