The model 4016819 has a nice touch with its compact shape that fits tight control panels.
Products Unlimited 9181010-15 Start Relay 336V Coil 35A 277VAC 38-D144C5161
This heavy duty relay has a confident click, which suggests the mechanism is solid and built for long life.
What stands out about the Square D 8501RS14V20 is the straightforward text that leaves little guesswork.
You will find that Miniduino boards pair well with common controllers, making setup less of a chore.