A nice touch is the crisp datasheet for the RS-1M, which speeds up planning.
irhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay Kit
You will find that Hach Lange has a reputation for dependable parts in industrial settings.
A nice touch is the heavy duty relay's handles longer cycles without fuss.
ELK keeps the datasheet clear, and what stands out is how easy it is to match this relay to a project.
This Model LZX920 looks solid, and it fits my panel without hassle.
Since I needed the SRD-12VDC-SL-C, I was glad to see it in the title.
You will find that the 2 pack of relays makes it easy to compare two setups side by side.
You will find that the 2pcs - 4pin relays work well with standard relay boards and small enclosures.
After a few installs, model 4016819 showed smooth switching that felt dependable in simple setups.
If you are new to relays, the JQC-3FF-S-Z is a friendly place to start.