Power relays are specifically designed to handle either AC or DC. It’s important to know the fundamental differences between them before building them into a system. Introduction to AC and DC ...

Most SSRs will similarly wait until the mains voltage crosses zero volts before switching on. If a mechanical relay turns on or off near the peak voltage when supplying AC, there is a sudden drop ...

Relays are still a good solution in some situations. When you’re dealing with high power, or when you need something exactly electrically identical to a closed switch, relays are a reasonable ...