A solid state relay switch is a control relay with isolated input and output, whose functions are achieved by means of electronic components without the use of moving parts such as those found in electromechanical relays. These electronic relays are ideal for applications with many contact closures since solid state relay switches offer a greatly extended life compared to electromechanical relays.
AC & DC input, AC output with 10A to 65A loads.
AD-SSR2/6 series relays
start at $40.00 (AD-SSR610-22-DCZ)
The Class 8 solid state relays offer energy efficient current switching in a slim housing ideal for space-saving applications.
AD-SSR8 series DIN rail solid state relays
start at $21.50
Solid state relays (SSR) are similar to electromechanical relays, in that both use a control circuit and a separate circuit for switching the load. When voltage is applied to the input of the SSR, the relay switch is energized by a light emitting diode. The light from the diode is beamed into a light sensitive semiconductor which, in the case of zero voltage crossover control relays, conditions the control circuit to turn on the output of the solid state relay switch at the next zero voltage crossover.
In the case of non-zero voltage crossover relays, the output of the solid state switch is turned on at the precise voltage occurring at the time. Removal of the input power disables the control circuit and the solid state relay switch is turned off when the load current passes through the zero point of its cycle.