3 terminal and 4 terminal models of ELO Electronic Regulators for Vehicle Alternators, which are produced with semiconductor technology just like all other ELO Electronic Regulators, have endless life since there is no mechanical movement inside the units. They are extremely resistant to shock and vibration. They can be used under all climatic conditions. They are also moisture resistant. 

Click Technical Specs for more information on ELO Electronic Regulators for Vehicle Alternators.