Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Isolated Input AC/DC Low On-Voltage Solid State Relay (SSR) - Solid-state discrete AC/DC relay uses MOSFETs for low on-voltage and has opto-isolated control input
Here is a basic solid-state relay that uses two back-to-back MOSFETs for on/off load control from either an AC or DC supply (either polarity).
As shown below, two N-MOSFETs are connected source-to source so that they can block voltage in either direction when OFF.
When their gates are biased ON they will switch a load from either an AC or bipolar DC supply (V_Source) since MOSFETs conduct equally well in either direction when ON.
MOSFETs have an efficiency advantage over SCRs for switching...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
