SSR's
20-25A SSR's are about $15 new (you can pick them up used or in surplus shops for about $10)
Image
Voltage out (max)
Voltage in
Current max
Distributor
250VAC
5VDC
20 Amp
Mouser
250VAC
4-32VDC
25 Amp
Digikey
480VAC
3-32VDC
25 Amp
Auber