MOSFET technology offers many advantages compared to other types of electromechanical and solid state relays on the market today. MOSFET relays have no physical contacts, therefore no contact bounce. They have a higher switching voltage, higher dielectric strength, greater resistance to shock and vibration and no moving parts. Additionally, MOSFET relays are silent while operating (no clicking sound). With no contact degradation MOSFET relays have a semi-permanent electrical life and since they do not have a coil there is no requirement for a surge absorber on the input side.