1. When used for AC inductive load communication, the output terminal will release high transient voltage and surge current, which will cause the solid-state relay to turn on or off or damage. Usually, voltage operating elements with special clamping voltage, such as multi wire zener diode or zinc oxide varistor (MOV), must be connected at the output. It is strongly recommended that the zinc oxide varistor be 1.6-1.9 times the rated voltage.
2. For DC inductive loads, such as solenoids, solenoids and solenoid valves, it is very important to use the freewheeling power circuit to suppress the self induced electromotive force caused by shutdown. Generally speaking, it is easy for diodes to be connected in reverse parallel with loads, but this power supply circuit will endanger the release time of inductive loads such as electromagnetic relays, AC contactors, electromagnetic coils, relays, etc. A good way is to connect the diode in reverse series with the zener diode, or connect the diode in series with the resistor, and then connect it in reverse parallel with the load.
3. When the load operates at a small current close to the minimum load current, a virtual load resistor must be connected in parallel with the load to reduce the leakage current at the output end, thereby generating a higher residual voltage on the load.
4. When welding PCB Relay, the welding temperature must be controlled below 260 and the welding time must be controlled below 5S.
5. In order to prevent the temperature rise of solid-state relay from exceeding the control value, the actual effect of heat dissipation and installation position should be considered when applying the design scheme. When two or more solid-state relays are installed in parallel, appropriate spacing shall be reserved.