Vishay rto seriesthick film 50w 1 to 220 power resistors vishay rto050f220r0fte1 this 220r high power 1 tolerance resistor uses thick film technology for its resistive element and is designed with a to 220 package that can dissipate 50w when fitted with a heatsink the resistor is suitable for any application where high power is required with small size eg power supplies energy conversion vishay rto050f220r0fte1 220r 1 50w thick film resistor t0 220