Extension kit and smart thermosta supported power

Hi All,

Im installing a thermostat with extension kit. the extension has to switch on the boiler as usual. I need also to power on two water pump circulator ( 220v, 50

Watt ). I would power on one pump with the same extension module and one with the thermostat. can i use the internal switch? can it bear this 220v load or i need an external relè?

Thanks