The NO Normally-Open SPST (Single Pole Single Throw) relay has an opened circuit state when no current is applied to its coil so basically it disconnects the power to the load in the inactive state.

Normally-Closed Single Pole Single Throw SPST relay. In figure 1 no DC voltage is applied to points A and B therefore no current flows through the coil of the relay, the contact stays in the close ...

Not long after I began contributing to Hagerty eight years ago, I wrote a detailed four-part piece on electrical relays and how they work in cars. You can still find the articles here (Part I: Why We ...

The MM1205 6x SPST relay represents the culmination of several important industry firsts: Greater DC and Analog Performance. High DC contact rating of 1 amp for up to 38 volts per channel ...