A nice touch with this DNF relay is the clear layout, which helps when you're wiring quickly.
DEIF CSQ-2 Check Synchronising Relay 115V
The 4016819 is straightforward to mount, and the screw holes line up with standard DIN rails.
It has a nice touch of being unbranded/general won't clash with your existing setup.
You will find that the TRAKTRONIX brand gives this relay a familiar, dependable presence.