What is the difference between high-voltage optocouplers and ordinary optocouplers?

The main difference between high-voltage optocouplers and ordinary optocouplers lies in the isolation voltage level they can withstand and some differences in design:
Isolation voltage: High voltage optocouplers are designed to handle higher isolation voltages, typically reaching several thousand volts, while the isolation voltage of ordinary optocouplers is usually lower, possibly only a few tens to hundreds of volts.
Structural design: In order to withstand higher voltages, high-voltage optocouplers may adopt more special designs, such as adding isolation barriers, using higher performance materials, etc., to improve their electrical isolation performance and safety.
Performance: High voltage optocouplers have good stability and reliability under high voltage, but may sacrifice transmission speed and response time compared to ordinary optocouplers.
Application field: High voltage optocouplers are mainly used in power systems, industrial control, medical equipment and other situations that require high voltage isolation; Ordinary optocouplers are widely used in various electronic devices, such as computers, communication equipment, household appliances, etc.
When choosing an optocoupler, it is necessary to decide whether to use a high-voltage optocoupler or a regular optocoupler based on specific application scenarios and requirements. The correct choice can help improve the performance and security of the system.