I will look for a relay that has a minimum of 15A and and another for 20A.
Alternatively, you can add an external SSR with that load requirement. All you would need to do is connect the SSR ( solid-state relay) to the relay on the board.
I did find an identical package and coil voltage replacement that can handle a 16A 250V. If you need to go higher than that, you will need an external SSR.
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can you make us a vacuum pump motor controller board with 15a-20a load capacity? yours will only go to 12 amps....