You will find that the relay base w/ relay sits flush, saving space behind crowded panels.
Struthers Dunn 6210-40-06-11 Relay 20A 550VAC Open 115VAC 60Hz Coil 4006-11
This relay bears the AMERICAN ZETTLER / MCE mark, a name that has been around for quite some time.
It is a nice touch that the PLC-RSC-24UC/21 pairs well with standard socket bases you likely already have.
You will find that this power relay fits nicely into many circuits, making daily projects easier to handle.
What stands out about this piece is that it's a contactor relay, giving you confidence during heavy switching.
You will find that the programmable timer helps keep routines consistent with less effort.
You will find that the GROBARPART name is printed neatly, which makes replacements less confusing.
A nice touch is the way the protection relay keeps an eye on your system and steps in when needed.
The 4016819 stands out for its tidy footprint, leaving room in the panel for other parts.
A nice touch is the auto-off, so you can leave the room without second-guessing anything.