Solid State Relay SSR-60AA 60A, voltage input 70-280V AC output 24-480V AC, with LED indicator, zero-crossing switch, built-in RC, high switching speed, anti-corrosion, moisture-proof, anti-vibration, especially suitable for frequent switching occasions.
|On-state voltage drop
|Off-state leakage current
||2500V AC (1min)
||500МΩ with 500V DC
||Install fan for cooling.
Tips: AC solid state relays vs DC solid state relays
Depending on the type of load power supply, SSRs can be divided into AC Solid State Relays (AC-SSRs) and DC Solid State Relays (DC-SSRs). AC-SSRs use a bidirectional thyristor as a switching device to turn on or off the AC load power supply. According to the type of control trigger, AC-SSR can be divided into zero-crossing and random turn-on. Zero-crossing AC-SSRs switch on when AC power supply goes through approx. zero voltage after control signals input. Therefore, their interference is small. The random turn-on AC-SSRs switch on or off in any phase of the AC power supply, so there may be more interference the moment they turn on.
Compared with AC-SSR, DC-SSR has no zero-crossing control circuit and does not need to install a absorption circuit, and its switching devices generally use high-power switching transistor, except which, they have the same working principles. When DC-SSR is used, it should be noted that:
- In the case of inductive load, such as DC solenoid valves or electromagnets, a diode should be set in parallel at both ends of the load. Meanwhile, its current should be equal to the operating current, and its voltage should be 4 times greater than the operating voltage.
- During its operation, try to put SSR close to the load, and its output lead should meet the needs of the load current.
- Its filtering electrolytic capacitor should be large enough when the used power supply is obtained by AC brownout rectification.