Solid state relay is a hybrid circuit, normally composed of an optocoupler isolates the input, a trigger circuit, which detects the zero crossing of the line current and a triac or similar device that acts as a power switch. Its name comes from the similarity presents an electromechanical relay, this device is generally used for applications where continuous usage has relay contacts that compared to a conventional relay generate a serious mechanical wear, besides being able to switch high amps in the case would destroy electromechanical relay contacts soon. These relays allow switching speeds much higher than electromechanical relays .
Minimum load current (called holding current 25-100mA) for the circuit to run smoothly. The triac is also responsible for a small streamresidual (in this circuit is 7 mA, which most manufacturers fail in their data sheets) this means that you can not obtain a complete separationthe burden of power, as with normal relay contacts.
- Control-voltage from 3V to 30V DC
- Output Voltage 115V-280V AC to
- Output-400W (unmodified, heat sink)
- Minimum operating-current 50 to 100mA