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August 15, 2019



Why You Should Use Solid State Relays


Relays are a vital part of any high current circuit, because if they fail the circuit will never turn on. Or even worse than that… it might never turn off. So, if these little components are so important, why wouldn’t you want the best? The best relays in terms of functionality and quality are solid state relays.

Now you’re probably wondering whether or not a solid state relay is the best option for your application...look no further.


Strengths of the Solid State Relay


  • Extended Electrical Life Expectancy A solid state relay typically has an electrical endurance of up to 1 million operations.
  Comparatively, this is 10 times longer than that of the electromechanical relay. This can be attributed to the absence of moving parts
  within the relay. The extended life reduces end user downtime due to maintenance.

  • Clean Signal An additional benefit of having no moving internal parts, is the elimination of noise and contact bounce. When the
  contacts of an electromechanical relay collide, they will make a sound and might also bounce off of each other, which then creates an
  arc of electricity. The absence of this contributes to a longer life and less energy loss in solid state relays.

  • Feedback Potential When it comes to a standard relay, we don’t have the ability to identify how well the relay is performing, only
  whether it works or does not work. However, there are solid state relays available that are equipped with an extra pin that has the
  ability to output a voltage that is directly proportional to the current the relay. With this functionality users are able to know the exact
  output current of their relay.

  • PWM Capability Another feature of a solid state relay is PWM, meaning that it is able to vary the output voltage, unlike
  electromechanical relays which only supply max voltage. This allows headlights, or a motor, using a solid state relay to build up to its
  peak intensity/speed, which often times extends the life of other components in the circuit.



Typical Applications


Because solid state relays are so compact and have no moving internal parts, they are ideal for high vibration & shock applications.

Additionally, due to their superior switching capabilities, solid state relays are ideal for applications that involve high switching frequency.

And finally, if your application features critical circuits required for the functionality of your vehicle or machine, solid state relays are perfect due to their long life expectancy and ability to provide feedback.



Common Types of Solid State Relays


We offer a competitive selection of solid state automotive relays, including Micro's, Mini's, Power Mini's, and Maxi's rated from 12A-50A. Beyond a wide selection, our on-staff relay experts can help you find the perfect relay for your specific application. Contact us today for sold state relay support.



ETA Solid State Relay