If you are browsing relays, you will find that the RS-1M has a familiar pin layout.
OPTO 22 ODC5P REMOTE I/O MODULE 3A 5-60 VDC SERIES NEW OLD STOCK
The 40ISR model behaves predictably in daily use, which makes bench testing feel straightforward.
In a stack of relays, the 2956026 EM-REL/KSR/120-21 is easy to spot by its markings.
This general purpose relay comes from Schneider Electric, so you know the build quality and consistency are there.
It's a nice touch seeing Omron stamped clearly, making identification quick during maintenance.
When I installed the Square D 8501RS14V20, the fit felt solid and the pins lined up.
I appreciate that the G3P-210B has a clean look, with consistent lettering and helpful orientation marks.
A nice touch is the DC 12V specification, so you know exactly how to power it safely.
The 40ISR model feels solid in hand, and the pins align well with common sockets.
If you want a simple switch that can manage more current, you will find that this power relay works well.