An electrical relay is a type of remote-control switch able to handle high-current accessories. Marlan Davis explains a 12-volt relay and how it works.

Aliso Viejo, Calif. – American Zettler Inc. claims its AZ2310 series 30-amp relay can switch up to 7,500-volt/amp resistive and 70-amp inrush-current loads, an increase of 227 percent over the AZ2300.