Contactors for capacitor switching Withstand unlimited peak current Capacitor switching application leads to very high current peak at capacitor energization. UA..RA contactors are designed with damping resistor to handle current peaks without limitation. Product benefits Widest contactor range on the market up to 80 Kvar Reliable in capacitor switching demanding application Easy selection with CAPCAL software. Product features UA..RA contactors, with damping resistors, are used when peak currents are far exceeding 100 times nominal rms current UA contactors are used when peak currents are less or equal to 100 times nominal rms current UAF..RA with wide control voltage range available, thanks to AF technology and electronic coil.