DC rated relay used to switch 240v AC | Electronics Forum Jan 27, 2013DC rated relay used to switch 240v AC. Thread starter Jagman; Start date Jan 25, 2013; J. Jagman New Member. Jan 25, 2013 #1 Hi all, As above, the million dollar question is can I use a typical automotive 12v relay to switch 240v ? The coil side of the relay will be switched by 12v with the 240v only running through the contacts. 220v relay switch | eBay Find great deals on eBay for 220v relay switch. Shop with confidence. Skip to main content. eBay Logo: AC 110V 220V 230V 240V Delay Turn OFF Module Relay Timer Control Switch. Brand New. $7. 6% off 2+ Buy It Now. AC 220V DC 12V Timer Delay Turn On/Off Switch Time Relay Module Adjustable USA See more like this.