I'm looking on digikey for an SCR and there is a parameter that concerns me: Voltage - On State (Vtm) (Max) It seems the maximum voltage rating for this parameter is 3.7V. I must be misunderstanding what this parameter means. Is there somewhere I could look up what it means? I plan to run a 12V motor pulling 3A and use the SCR as a switch instead of a big bulky relay. But if the max voltage is only 3.7V, then I must look for an alternative solution.