Solid State Overload Relays

What you need to know about solid state relays.

Solid state relays, also known as SSR’s, are relays that have no moving parts. They are an electronic type of overload relay that utilize transistors, sensors and other electronic components that act on a signal in order to indicate an overload. These electrical components are set to measure the current much more accurately than mechanical overload relays can. Solid state relays are rated to handle up to 50 amps and 24V. Both solid state DC relays and AC solid state relays are available to switch AC and DC electrical loads.

The solid state relay advantage.

Solid state relays have many advantages to mechanical relays, and while they cannot withstand overloads for as long as their counterparts, they do offer extremely fast switching time. They are virtually noiseless and they do not rely on contacts which can wear out over time. This also results in a longer lifespan and less maintenance. Another advantage of solid state relays is their use across low voltage and low current applications. Solid state relays also tend to be smaller in size, and can be used in more dangerous and harsher environments as there is no risk of sparking.