Working With Optically-Isolated Relays
Not so long ago, all relays performed their switching duties through electromechanical means. Today, however, engineers can also opt for solid-state relays that use semiconductors to switch their output circuits. The choice between traditional electromechanical relays and the solid-state varieties comes often comes down to reliability and performance. With no moving parts, solid-state relays avoid all the obvious mechanical failure modes associated with traditional relays. They also tend to offer desirable electrical characteristics and design advantages including:
- Low power consumption.
- Low leakage current.
- Stable on-resistance over lifetime.
- High reliability with extremely long life.
- Small size.
- Fast switching speeds.
- High vibration and shock resistance.
- No contact bounce or switching noise.
Keep in mind that solid-state are not created equal when it comes to these performance advantages. Optically-isolated relays, in particular, can outshine other solid-state devices that use electrical or magnetic operating principles. To learn more about the operating principles of optically-isolated relays, how to apply them in different applications and how to maximize their long life cycles, download our white paper.