The relay offers a satisfying mechanical snap, and what stands out about it is that the sound helps you know it worked.
Bircher TZAr Relay VDE 0435 220V 50/60HZ 3VA
A nice touch is the labeling on, which makes identifying coil polarity simple when you are deep into a wiring session.
A nice touch is the INDUSTRIAL MRO brand, which pairs well with standard DIN rail setups.
A nice touch is the clear labeling on the relay switch for quick wiring.