Thermal Resistance, Junction to Case *Indicates JEDEC Registered Data. 1. VDRM and VRRM for all types can be applied on a continuous basis. Ratings apply for zero or negative gate voltage; however, positive gate voltage shall not be applied concurrent with negative potential on the anode. Blocking voltages shall not be tested with a constant current source such that the voltage ratings of the devices are exceeded. Preferred devices are Motorola recommended choices for future use and best overall value.