What is the difference between Qubino flush 1 vs 1d? Can I use flush 1 relay to control a garage door?
1D is a dry contact relay while 1 is relay. The difference is a normal relay will use the incoming power and use that voltage for the switched terminal while a dry contact relay has input and output and basically connects/disconnects those two wires like a switch. So the voltage and type DC/AC of the dry contact can differ from the power of the relay itself.
In the case of a garage door opener you would need a dry contact relay to mimic the push of the opener button.