Omron Solid State Relay User’s Guide

SSR stands for Solid State Relay. First marketed in the 1970’s, SSRs have recently become very popular for the following reasons.
• As a means of creating no-contact relays in output power sections accompanying conversion of control circuits to ICs.
• As a means of increasing service life and reducing maintenance.
• As a means of preventing operating errors caused through noise by isolating signal circuits and outputs.
• As a means of reducing the clicking sounds produced when load currents turn ON.
In these and other ways, SSRs have proven to provide many special characteristics to meet market needs, and OMRON SSRs have been developed in product series to meet the needs of our customers.
This guidebook has been produced in response to demand from customers to provide the product and technical information required to select the best SSRs according to purpose and application. In this, we hope that this guidebook is helpful to you in applying OMRON SSRs.