Solid-state relays are replacements for mechanical relays. Allowing you to control high-current / high-voltage loads with a much smaller control current. Changing to a solid-state relay allows for much faster switching times with no mechanical wear.
MOSFET-Load Solid-state Relays are for applications with a DC Load , and are triggered by a DC control Current .
Resistive-Load Solid-state Relays are for applications with a resistive AC Load such as a heater or an incandescent light bulb , and they are triggered by an AC control Current .
Inductive-Load Solid-state Relays are for applications with an inductive AC Load such as a motor or an amplifier that has a high inrush current . Inductive-Load Solid-state Relays are triggered by an AC control Current .
If you are controlling an AC circuit that combines types, such as device with both a heater (resistive) and a Fan (Inductive) or if you are not sure of the type of load you are controlling, then you will want to use an Inductive relay, because Solid-state relays designed for inductive loads can easily handle resistive loads, but SSRs designed for resistive loads will fail when used with inductive circuits.
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