Journal
Selection guides, application notes and installation know-how for solid state relays and SCR power control.
An SSR switches the load fully on or off; an SCR module regulates voltage and power continuously from a 4-20 mA signal. Compare working principles, applications and the checks to run before ordering.
Related products
Solid state relays and SCR controllers referenced in our application notes.
DREL SSR480D zero-cross solid state relay. A 3-32 VDC control input switches 40 A of 40-480 VAC load with no contacts, no arcing and long service life for heating, motor and automation loads.
DREL MTC250A 1600V SCR module paired with the DREL three-phase power/voltage controller. A weak 4-20 mA signal governs strong three-phase heating loads with precise voltage or power regulation.