Heavy copper PCBs can carry dozens of amps on standard trace widths: https://www.epectec.com/articles/heavy-copper-pcb-design.html https://www.epectec.com/artic

Heavy copper PCBs can carry dozens of amps on standard trace widths: https://www.epectec.com/articles/heavy-copper-pcb-design.html https://www.epectec.com/articles/heavy-copper-pcb-design.htm... Much more expensive than regular PCBs, of course.