Crodom/Sensata D53TP50D, 3 phase, Solid State Relay, Rated at up to 530 Vac at 50 A, electronic contactor, 3-32 Vdc. control input, Din rail mount and large finned heat sink included $35 ea. I have a few of these available. Data sheet available.
Text or call Mike for more info 416 677 2067