Why Solid State Relays?
Although there are advantages to using both types of relays, solid state relays are fast becoming the better choice in many applications, especially throughout the telecommunication and microprocessor control industries. The high reliability and long life mean less field failures and better product performance. Low input signal levels are ideal for TTL or CMOS applications, and less power consumption translates to longer batter life in portable devices. The overwhelming advantages of solid state relays lie in the isolation voltage, package dimensions and multifunction capabilities. These advantages are increasingly becoming apparent in the telecom industry. For most tele-communication applications, especially those in Europe, high input to output isolation voltage is required. Typical standards require a minimum input to output isolation voltage of 2500VAC. Not only do solid state relays meet these requirements, most far surpass them. Figure 3 shows a comparison between the package vol
