1. What is an optocoupler relay?
An optocoupler relay refers to an optocoupler that contains a MOSFET optocoupled to an LED. A photorelay refers to a device that integrates a light-emitting device and a light-receiving device.
Optocoupler relays have many advantages over mechanical relays, such as longer life, low current drive and fast response. It can be used for various purposes and applied to micro-signal and analog signal switches.
Optocoupler relays are widely used in contact switches in semiconductor test systems, security systems, etc. For example: Omron's optocoupler relay represented by Shenzhen Saddle Point Technology, Omron provides ultra-small DIP series for semiconductor test system applications, SOP4 pin load voltage 60V, SOP4 pin load voltage 80V, SOP4 pin load voltage 2000V, SOP4 pin load voltage 350V, MOS FER optocoupler relays in 400V, SOP6-pin series packages, and general-purpose relays with high current and high load voltage in various packages are also available.
2. Features of optocoupler relay (MOS output):
1. No contact, so there is no contact wear, and the service life is infinite;
2, no vibration and bounce; shock-proof, anti-fall;
3. No action sound;
4. Small size (in-line and SMD packages), high reliability;
5. Both AC/DC;
6. High-speed switching;
7. Low discharge voltage;
8. Low operating current (saving current);
9. Low leakage current when open circuit;
10. Complete isolation between input and output.
11. It can control various loads (relays, lamps, light-emitting diodes, heaters, motors, electromagnetic suction cylinders, etc.).
The optocoupler relay has no life. The light-emitting diode is turned on and off, and the receiving diode is turned on and off, so it will not be damaged due to aging. Therefore, optocoupler relays are suitable for fields where switching is required repeatedly.
The relay contact types are: 1 normally open, 1 normally closed, 1 open and 1 closed, 2 normally open and 2 normally closed. But in fact, the optocoupler relay can also be divided into MOS (field effect transistor) output or SCR (silicon controlled rectifier) output according to the output structure. The load current of the MOS output is relatively small (usually several hundred mA), while the load current of the SCR output is relatively large (can reach several mA).