The main parameters of optocoupler relays usually include:

Input current: The driving current required at the input end, usually measured in milliamps (mA).

Output current/load current: The maximum current that a relay can output, usually measured in amperes (A).

Maximum operating voltage: The maximum operating voltage that a relay can withstand.

Relay type: such as normally open (NO) or normally closed (NC) relay.

Isolation voltage: The isolation voltage between the input and output terminals, used to prevent signal interference.

Switching speed: The response time of a relay, which is the speed of the switching action.

Temperature range: The temperature range within which the relay operates reliably.

Packaging type: The physical packaging form of optocoupler relay, such as DIP, SMD, etc.

Isolation performance: The performance indicators of relays in isolating input and output signals.

Leakage current: a small leakage current that may exist when the relay is turned off.

These parameters can vary depending on different relay models and manufacturers. When choosing an optocoupler relay that suits your application needs, it is important to pay attention to these key parameters to ensure that it can operate stably and reliably in specific situations.