Tdk lambda medical ac dc external power supply dtm65 c dtm110 s series tdk lambda dtm 65pw 240 c the tdk lambda dtm65pw240c is a medical certified ac dc external power supply with output power rating of 65w this power supply is from the dtm65 c series and operates with a universal ac input of 90 to 264v ac 47 63hz typical operating efficiencies are greater than 85 this highly efficient power supply includes overvoltage and short circuit protection plus the offno load standby power