Snubber circuit for contactor

[vonskyes]

I need to connect an RC-snubber circuit across the coil of a 20A 230V 50hz contactor (DILEM 10) in order to mitigate the effect of voltage transients due to inductive loads connected on the circuit. I need to specify the values of the resistor and capacitor to help me in selecting the right components.
Pls help!!!!!!!

 

[jiripolivka]

A typical snubber circuit for such application comprises a 0.1 to 0.5 uF capacitor rated for >630 V AC, and a 5 to 100 Ohms resistor, 1...5 Watts. Exact values depend upon the load type, inductive loads generate larger transients and require larger caps and smaller resistors in the snubber circuit.