a 30-40 amp triac

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need to turn an electric hot water on and off controlled by an op amp/ thermisistor circuit.
looking at either a relay or triac. need a 30 amp per leg (220v) so two triacs or an alternistor
http://www.littelfuse.com/data/en/Da...istorTriac.pdf
but if I am reading it right I need 200ma gate current?
any suggestions or just go with a DPST relay?​
 

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