The Power Relay/Battery Isolator engages smoothly, and you can hear a reassuring click at each cycle.
AZ2150-1A-15DEF 15VDC COI, 40A, MINI Power Relay, Relay, SPST-NO
It's a nice touch that Uxcell is the brand here, and it helps when later.
What stands out about RPM-Q2R20120-01 is how easy it is to identify among similar models.
The RPM-Q2R20120-01 designation makes tracking simpler, and you will find that very helpful.
A nice touch is the subtle notch on the BU1 AC that lines up with the base each time.
I like that the programmable timer lets you schedule on-off times without hassle.
Many folks that this relay has the Square D name, a brand they have used for years.
The FTR-F3 model shows sensible contact gaps that help reduce chatter in everyday use.
After comparing a, I settled on the THC-15A model because it sits nicely in the panel without crowding other parts.
A nice touch is the heavy duty casing, which lines up with the switch control and makes daily adjustments feel easy.