Not a recommendation (haven't used it in earnest yet, just initial testing) but I'm using a relay from Electric Center (how it pains me to use that spelling...). For less than a fiver or so, seems to do the job. Contacts look reasonable. My control box has a 650VA toroid. Switching on, there's just the load of charging the capacitors. Switching off is when there might be a bigger load, but only on hitting the e-stop which should be a rare event. I hope. Normal switch-off is lightly loaded as no motors turning, so only breaking relatively low currents. That's my thinking, anyway. If it does fail one day, then it's a fiver and an unplug/plug job to swap it.

OTOH, my lathe uses a chunky multi-pole contactor that sounds like the crack of doom when it operates, but then it's switching a 3HP motor on load. 3-4 times the price, typically multi-pole so bigger physically. But probably last for ever in this application.