I’m after a relay that can power a 12vdc, 20Amp pump.
I would like to control using Arduino 5v logic
I’m afraid all our Arduino relay shields are either max out at 5A or 7A
However this relay control unit kit will go up to 20A.
Is there a reason not to use a Power Mosfet? eg
For that power and amperage I would look towards one of the 3D Printer Mosfet Heaterbed Units
Alternatively you can use this from Jaycar