You will find that Dayton relays come with clear markings that make wiring less confusing for most people.
TAKENAKA 2302 I3NG5 BARRIER RELAY SYSTEM
A nice touch is that the brand is Deltrol, which I have relied on before.
I like seeing Functional Devices, Inc. listed as the brand; it feels reassuring and familiar.
It handles DC 12V inputs cleanly, and you will find that setup takes only minutes.
What stands out about the CSPC branding is how it stays crisp even after light handling.
What stands out about the build is the relay base w/ relay made from heat resistant material.
You will find that the relay base w/ relay simplifies replacements by keeping pins clearly arranged.
A nice touch is that the board itself shows the SRD-12VDC-SL-C designation.
This protection relay fits most enclosures, and it helps keep your setup protected without taking up much space.