AP830 Series 30 Watts TO-220 High Power Resistors. The AP830 series Non-inductive 25 Watt high power T0-220 resistor pack with a very low thermal resistance. Applications for the AP830 series include:- High frequency emitter circuits in switching power supplies; voltage regulation; low energy pulse loading; Motor control circuits; Motor drive circuits. 30 Watts at 25 C case temperature on heat sink (Using thermal grease) Single Moulded case for protection Easy to mount to heat sink via single screw mounting hole Electrically isolated case