Opto 22 knows solid-state relays (SSRs) very, very well. We’ve been manufacturing our optically isolated, epoxy-filled SSRs for more than 40 years, and over that time have gained quite a bit of practical knowledge and experience about using SSRs in applications.

SSRs have replaced electromechanical relays (EMRs) in many applications, thanks to their advantages:

• long service life
• low noise generation
• compact size
• no moving parts
• total absence of arcing