Opto 22's Power Series SSRs, like the 120D10, are renowned for their reliability and performance. Introduced in 1974, these relays feature liquid epoxy-filled encapsulation, providing enhanced durability and reduced manufacturing costs. The 120D10 model offers 120 VAC, 10 Amp DC control, 4,000 volts of optical isolation, and is subjected to rigorous testing before and after encapsulation. This ensures consistent performance and a long operational lifespan, making it suitable for demanding industrial environments such as motor control, lighting systems, and process automation.