Working With Optically-Isolated Relays

August 26, 2013
By Anonymous


All Relays used to perform 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 and the Solid-State Relay varieties often comes down to two factors: reliability and performance.

Solid-State Relays

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 Optically-Isolated Relays - PhotoMOS - Panasonic Industrial Devicesadvantages 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

Optically-Isolated Relays

Keep in mind that Solid-State Relays 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 Panasonic's White Paper.