Power supply to Arduino

Hello

I'm studing this relay to apply.

They say the following:

The rated current of 2A corresponds to the limiting continuous currente

So I=P/V gives 500W... P=I.V

But consumes 40mA as you can see on page 2, at 'coil specifications'.

What do you think? Can I use it?

Please let me know
Thanks on advance
Best regards
Pedro Ferrer