relay shield switching 230V ?

Is it safe to use the relay shield to switch a (low current) 230V power line? The specs say “Maximal Switching Voltage: AC240V”, but then I read “Contact rating: 3A AC120V”. Is the maximum current at 230V not documented, or is it simply too close to maximum to be considered safe?

It can support 230V, but the current should be limited.