Phoenix Contact Photocouplers SSR 629939 - Phoenix Contact 2967950, The Phoenix Contact Miniature Solid-State Relay OPT-24DC/230AC/1 is a semiconductor switch with zero crossing features, ideal for reliable, high-speed electronic switching. It operates with a 24V DC control voltage and supplies up to 230V AC at the output, making it suitable for automated control systems. This relay is often used in industrial automation and control panels to switch loads without physical contacts. Phoenix Contact 2967950 Miniature Solid-State Relay 24V DC Input 253V AC Output